1
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Gabbani A, Della Latta E, Mohan A, Scarperi A, Li X, Ruggeri M, Martini F, Biccari F, Kociak M, Geppi M, Borsacchi S, Pineider F. Direct Determination of Carrier Parameters in Indium Tin Oxide Nanocrystals. ACS NANO 2024. [PMID: 38804721 DOI: 10.1021/acsnano.4c02875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
We develop here a comprehensive experimental approach to independently determine charge carrier parameters, namely, carrier density and mass, in plasmonic indium tin oxide nanocrystals. Typically, in plasmonic nanocrystals, only the ratio between these two parameters is accessible through optical absorption experiments. The multitechnique methodology proposed here combines single particle and ensemble optical and magneto-optical spectroscopies, also using 119Sn solid-state nuclear magnetic resonance spectroscopy to probe the surface depletion layer. Our methodology overcomes the limitations of standard fitting approaches based on absorption spectroscopy and ultimately gives access to carrier effective mass directly on the NCs, discarding the use of literature value based on bulk or thin film materials. We found that mass values depart appreciably from those measured on thin films; consequently, we found carrier density values that are different from reported literature values for similar systems. The effective mass was found to deviate from the parabolic approximation at a high carrier density. Finally, the dopant activation and defect diagram for ITO NCs for tin doping between 2.5 and 15% are determined. This approach can be generalized to other plasmonic heavily doped semiconductor nanostructures and represents, to the best of our knowledge, the only method to date to characterize the full Drude parameter space of 0-D nanosystems.
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Affiliation(s)
- Alessio Gabbani
- Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
- Department of Physics and Astronomy, Università degli Studi di Firenze, via Sansone 1, 50019 Sesto Fiorentino, (FI), Italy
| | - Elisa Della Latta
- Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Ananthakrishnan Mohan
- Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Andrea Scarperi
- Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Xiaoyan Li
- Laboratoire de Physique des Solides, Université Paris-Saclay, CNRS, 91405 Orsay, France
| | - Marina Ruggeri
- Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Francesca Martini
- Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
- Center for Instrument Sharing of the University of Pisa (CISUP), 56124 Pisa, Italy
| | - Francesco Biccari
- Department of Physics and Astronomy, Università degli Studi di Firenze, via Sansone 1, 50019 Sesto Fiorentino, (FI), Italy
| | - Mathieu Kociak
- Laboratoire de Physique des Solides, Université Paris-Saclay, CNRS, 91405 Orsay, France
| | - Marco Geppi
- Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
- Institute of Chemistry of Organometallic Compounds, Italian National Research Council (ICCOM-CNR), via G. Moruzzi 1, 56124 Pisa, Italy
- Center for Instrument Sharing of the University of Pisa (CISUP), 56124 Pisa, Italy
| | - Silvia Borsacchi
- Institute of Chemistry of Organometallic Compounds, Italian National Research Council (ICCOM-CNR), via G. Moruzzi 1, 56124 Pisa, Italy
- Center for Instrument Sharing of the University of Pisa (CISUP), 56124 Pisa, Italy
| | - Francesco Pineider
- Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
- Department of Physics and Astronomy, Università degli Studi di Firenze, via Sansone 1, 50019 Sesto Fiorentino, (FI), Italy
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2
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Carvalho WOF, Oliveira ON, Mejía-Salazar JR. Magnetochiroptical nanocavities in hyperbolic metamaterials enable sensing down to the few-molecule level. J Chem Phys 2024; 160:071104. [PMID: 38380755 DOI: 10.1063/5.0183806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 01/28/2024] [Indexed: 02/22/2024] Open
Abstract
In this work, we combine the concepts of magnetic circular dichroism, nanocavities, and magneto-optical hyperbolic metamaterials (MO-HMMs) to demonstrate an approach for sensing down to a few molecules. Our proposal comprises a multilayer MO-HMM with a square, two-dimensional arrangement of nanocavities. The magnetization of the system is considered in polar configuration, i.e., in the plane of polarization and perpendicular to the plane of the multilayer structure. This allows for magneto-optical chirality to be induced through the polar magneto-optical Kerr effect, which is exhibited by reflected light from the nanostructure. Numerical analyses under the magnetization saturation condition indicate that magnetic circular dichroism peaks can be used instead of reflectance dips to monitor refractive index changes in the analyte region. Significantly, we obtained a relatively high sensitivity value of S = 40 nm/RIU for the case where refractive index changes are limited to the volume inside nanocavities, i.e., in the limit of a few molecules (or ultralow concentrations), while a very large sensitivity of S = 532 nm/RIU is calculated for the analyte region distributed along the entire superstrate layer.
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Affiliation(s)
- William O F Carvalho
- Sao Carlos Institute of Physics, University of Sao Paulo, CP 369, 13560-970 São Carlos, SP, Brazil
| | - Osvaldo N Oliveira
- Sao Carlos Institute of Physics, University of Sao Paulo, CP 369, 13560-970 São Carlos, SP, Brazil
| | - J R Mejía-Salazar
- National Institute of Telecommunications (Inatel), Santa Rita do Sapucaí, MG 37540-000, Brazil
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3
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Lobet M, Kinsey N, Liberal I, Caglayan H, Huidobro PA, Galiffi E, Mejía-Salazar JR, Palermo G, Jacob Z, Maccaferri N. New Horizons in Near-Zero Refractive Index Photonics and Hyperbolic Metamaterials. ACS PHOTONICS 2023; 10:3805-3820. [PMID: 38027250 PMCID: PMC10655250 DOI: 10.1021/acsphotonics.3c00747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 10/03/2023] [Accepted: 10/03/2023] [Indexed: 12/01/2023]
Abstract
The engineering of the spatial and temporal properties of both the electric permittivity and the refractive index of materials is at the core of photonics. When vanishing to zero, those two variables provide efficient knobs to control light-matter interactions. This Perspective aims at providing an overview of the state of the art and the challenges in emerging research areas where the use of near-zero refractive index and hyperbolic metamaterials is pivotal, in particular, light and thermal emission, nonlinear optics, sensing applications, and time-varying photonics.
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Affiliation(s)
- Michaël Lobet
- Department
of Physics and Namur Institute of Structured Materials, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
- John
A. Paulson School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Nathaniel Kinsey
- Department
of Electrical and Computer Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Iñigo Liberal
- Department
of Electrical, Electronic and Communications Engineering, Institute
of Smart Cities (ISC), Public University
of Navarre (UPNA), Pamplona 31006, Spain
| | - Humeyra Caglayan
- Faculty
of Engineering and Natural Science, Photonics, Tampere University, 33720 Tampere, Finland
| | - Paloma A. Huidobro
- Departamento
de Física Téorica de la Materia Condensada and Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, E-28049 Madrid, Spain
- Instituto
de Telecomunicações, Instituto
Superior Técnico-University of Lisbon, Avenida Rovisco Pais 1, Lisboa, 1049-001, Portugal
| | - Emanuele Galiffi
- Photonics
Initiative, Advanced Science Research Center, City University of New York, New
York, New York 10027, United States
| | | | - Giovanna Palermo
- Department
of Physics, NLHT Lab, University of Calabria, 87036 Rende, Italy
- CNR NANOTEC-Institute
of Nanotechnology, Rende (CS), 87036 Rende, Italy
| | - Zubin Jacob
- Elmore
Family School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck
Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Nicolò Maccaferri
- Department
of Physics, Umeå University, Linnaeus väg 24, 90187 Umeå, Sweden
- Department
of Physics and Materials Science, University
of Luxembourg, 162a avenue
de la Faïencerie, L-1511 Luxembourg, Luxembourg
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4
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Han Z, Ali W, Mao T, Wang F, Wang X. Magnetoplasmonic gold nanorods for the sensitive and label-free detection of glutathione. NANOSCALE ADVANCES 2023; 5:4670-4674. [PMID: 37705783 PMCID: PMC10496891 DOI: 10.1039/d3na00396e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 08/04/2023] [Indexed: 09/15/2023]
Abstract
This work exploits the magneto-optical activity of gold nanorods for the detection of sub-micromolar concentrations of glutathione using magnetic circular dichroism spectroscopy. Modulations of the magnetoplasmonic response of nanorods serve as the basis of the sensing methodology, whereby the presence of glutathione induces the end-to-end assembly of nanorods. In particular, the nanorod self-assembly enables a localized electric field in the nanocavities with adsorbed thiol molecules, whose field strength is amplified by the external magnetic field as confirmed by finite-element modeling, enabling their high-sensitivity detection. Our simple magnetoplasmonic sensor for glutathione requires no specific chemical tags and exhibits an impressive limit of detection of 97 nM.
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Affiliation(s)
- Zexiang Han
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology Beijing 100190 P. R. China
| | - Wajid Ali
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology Beijing 100190 P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan Institute of Optoelectronic Integration, College of Materials Science and Engineering, Hunan University Changsha Hunan 410082 P. R. China
| | - Ting Mao
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
| | - Fei Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology Beijing 100190 P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Xiaoli Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology Beijing 100190 P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences Beijing 100049 P. R. China
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5
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Ikram M, Li Y, Zhang Z. Magnetic field caused enhanced absorption and circular dichroism of an achiral plasmonic nanostructure. APPLIED OPTICS 2023; 62:5386-5393. [PMID: 37706854 DOI: 10.1364/ao.492636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 06/08/2023] [Indexed: 09/15/2023]
Abstract
In this paper, modulation of light-matter interactions by a magnetic field is used to generate circular dichroism (CD) from an achiral plasmonic nanostructure. Theoretical investigations show an increase in light absorption by the nanostructure in the presence of a magnetic field. The achiral nanostructure exhibits CD in external magnetic field parallel to circularly polarized light (CPL) incidence. The CD emergence is caused by modulation of electron motion to reduced/enhanced frequencies under CPL incidence. Compared to previous studies, in this paper the mechanism of CD emergence, and the physical reasoning behind the change in CD due to change in magnetic field direction and intensity, are explained. CD intensity increases with increasing magnetic field intensity, while CD sign changes on magnetic field direction reversal. Varying structural parameters significantly influences CD intensity. This study can be helpful in magneto-optics and in magneto-chiral applications.
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6
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Gabbani A, Sangregorio C, Tandon B, Nag A, Gurioli M, Pineider F. Magnetoplasmonics beyond Metals: Ultrahigh Sensing Performance in Transparent Conductive Oxide Nanocrystals. NANO LETTERS 2022; 22:9036-9044. [PMID: 36346871 PMCID: PMC9706655 DOI: 10.1021/acs.nanolett.2c03383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Active modulation of the plasmonic response is at the forefront of today's research in nano-optics. For a fast and reversible modulation, external magnetic fields are among the most promising approaches. However, fundamental limitations of metals hamper the applicability of magnetoplasmonics in real-life active devices. While improved magnetic modulation is achievable using ferromagnetic or ferromagnetic-noble metal hybrid nanostructures, these suffer from severely broadened plasmonic response, ultimately decreasing their performance. Here we propose a paradigm shift in the choice of materials, demonstrating for the first time the outstanding magnetoplasmonic performance of transparent conductive oxide nanocrystals with plasmon resonance in the near-infrared. We report the highest magneto-optical response for a nonmagnetic plasmonic material employing F- and In-codoped CdO nanocrystals, due to the low carrier effective mass and the reduced plasmon line width. The performance of state-of-the-art ferromagnetic nanostructures in magnetoplasmonic refractometric sensing experiments are exceeded, challenging current best-in-class localized plasmon-based approaches.
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Affiliation(s)
- Alessio Gabbani
- INSTM
and Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124Pisa, Italy
- Department
of Physics and Astronomy, Università
degli Studi di Firenze, via Sansone 1, 50019Sesto Fiorentino, FI, Italy
- CNR-ICCOM, Via Madonna
del Piano 10, 50019Sesto Fiorentino, FI, Italy
| | - Claudio Sangregorio
- CNR-ICCOM, Via Madonna
del Piano 10, 50019Sesto Fiorentino, FI, Italy
- INSTM
and Department of Chemistry “U. Schiff”, Università degli Studi di Firenze, via della Lastruccia 3, 50019Sesto Fiorentino, FI, Italy
| | - Bharat Tandon
- Department
of Chemistry, Indian Institute of Science
Education and Research (IISER), Pune411008, India
| | - Angshuman Nag
- Department
of Chemistry, Indian Institute of Science
Education and Research (IISER), Pune411008, India
| | - Massimo Gurioli
- Department
of Physics and Astronomy, Università
degli Studi di Firenze, via Sansone 1, 50019Sesto Fiorentino, FI, Italy
| | - Francesco Pineider
- INSTM
and Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124Pisa, Italy
- Department
of Physics and Astronomy, Università
degli Studi di Firenze, via Sansone 1, 50019Sesto Fiorentino, FI, Italy
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7
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Kim JW, Cho NH, Kim RM, Han JH, Choi S, Namgung SD, Kim H, Nam KT. Magnetic Control of the Plasmonic Chirality in Gold Helicoids. NANO LETTERS 2022; 22:8181-8188. [PMID: 36200711 DOI: 10.1021/acs.nanolett.2c02661] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Chiral plasmonic nanostructures have facilitated a promising method for manipulating the polarization state of light. While a precise structural modification at the nanometer-scale-level could offer chiroptic responses at various wavelength ranges, a system that allows fast response control of a given structure has been required. In this study, we constructed uniformly arranged chiral gold helicoids with cobalt thin-film deposition that exhibited a strong chiroptic response with magnetic controllability. Tunable circular dichroism (CD) values from 0.9° to 1.5° at 550 nm wavelength were achieved by reversing the magnetic field direction. In addition, a magnetic circular dichroism (MCD) study revealed that the gap structure and size-related surface plasmon resonance induced MCD peaks. We demonstrated the transmitted color modulation, where the color dynamically changed from green-to-red, by controlling the field strength and polarizer axis. We believe current work broadens our understanding of magnetoplasmonic nanostructure and expands its potential applicability in optoelectronics or optical-communications.
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Affiliation(s)
- Jeong Won Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Nam Heon Cho
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Ryeong Myeong Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Jeong Hyun Han
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Seungwoo Choi
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Seok Daniel Namgung
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyeohn Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
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8
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Bhalla N, Thakur A, Edelman IS, Ivantsov RD. Endorsing a Hidden Plasmonic Mode for Enhancement of LSPR Sensing Performance in Evolved Metal-insulator Geometry Using an Unsupervised Machine Learning Algorithm. ACS PHYSICAL CHEMISTRY AU 2022; 2:459-467. [PMID: 36855609 PMCID: PMC9955251 DOI: 10.1021/acsphyschemau.2c00033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/24/2022] [Accepted: 08/25/2022] [Indexed: 11/28/2022]
Abstract
Large-area nanoplasmonic structures with pillared metal-insulator geometry, also called nanomushrooms (NM), consist of an active spherical-shaped plasmonic material such as gold as its cap and silicon dioxide as its stem. NM is a geometry which evolves from its precursor, nanoislands (NI) consisting of aforementioned spherical structures on flat silicon dioxide substrates, via selective physical or chemical etching of the silicon dioxide. The NM geometry is well-known to provide enhanced localized surface plasmon resonance (LSPR) sensitivity in biosensing applications as compared to NI. However, precise optical phenomenon behind this enhancement is unknown and often associated with the existence of electric fields in the large fraction of the spatial region between the pillars of NM, usually accessible by the biomolecules. Here, we uncover the association of LSPR enhancement in such geometries with a hidden plasmonic mode by conducting magneto-optics measurements and by deconvoluting the absorbance spectra obtained during the local refractive index change of the NM and NI geometries. By the virtue of principal component analysis, an unsupervised machine learning technique, we observe an explicit relationship between the deconvoluted modes of LSPR, the differential absorption of left and right circular polarized light, and the refractive index sensitivity of the LSPR sensor. Our findings may lead to the development of new approaches to extract unknown properties of plasmonic materials or establish new fundamental relationships between less understood photonic properties of nanomaterials.
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Affiliation(s)
- Nikhil Bhalla
- Nanotechnology
and Integrated Bioengineering Centre (NIBEC), School of Engineering, Ulster University, Jordanstown, Shore Road, Newtownabbey, Northern Ireland BT37 0QB, United Kingdom,Healthcare
Technology Hub, Ulster University, Jordanstown, Shore Road, Newtownabbey, Northern Ireland BT37 0QB, United Kingdom,E-mail:
| | - Atul Thakur
- Amity
Institute of Nanotechnology, Amity University
Haryana, Gurugram, Haryana 122413, India
| | - Irina S. Edelman
- Kirensky
Institute of Physics, FRC KSC Siberian Branch
of Russian Academy of Sciences, Krasnoyarsk 660036, Russia
| | - Ruslan D. Ivantsov
- Kirensky
Institute of Physics, FRC KSC Siberian Branch
of Russian Academy of Sciences, Krasnoyarsk 660036, Russia
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9
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Kuszynski JE, Kays JC, Conti CR, McGill SA, Dennis AM, Strouse GF. Effective Mass for Holes in Paramagnetic, Plasmonic Cu 5FeS 4 Semiconductor Nanocrystals. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:12669-12679. [PMID: 37560086 PMCID: PMC10410696 DOI: 10.1021/acs.jpcc.2c03459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
The impact of a magneto-structural phase transition on the carrier effective mass in Cu5FeS4 plasmonic semiconductor nanocrystals was examined using Magnetic Circular Dichroism (MCD). Through MCD, the sample was confirmed as p-type from variable temperature studies from 1.8 - 75 K. Magnetic field dependent behavior is observed, showing an asymptotic behavior at high field with an m ∗ value 5.98 m ∗ ∕ m e at 10 T and 2.73 m ∗ ∕ m e at 2 T. Experimentally obtained results are holistically compared to SQUID magnetization data and DFT results, highlighting a dependency on vacancy driven polaronic coupling, magnetocrystalline anisotropy, and plasmon coupling of the magnetic field all contributing to an overall decrease in the hole mean free path dependent on the magnetic field applied to Cu5FeS4.
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Affiliation(s)
- Jason E. Kuszynski
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee FL 32306, USA
| | - Joshua C. Kays
- Department of Biomedical Engineering, Boston University, Boston MA 02215, USA
| | - Carl R. Conti
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee FL 32306, USA
| | | | - Allison M. Dennis
- Department of Biomedical Engineering, Boston University, Boston MA 02215, USA
- Division of Materials Science & Engineering, Boston University, Boston MA 02215, USA
| | - Geoffrey F. Strouse
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee FL 32306, USA
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10
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Cheng OHC, Zhao B, Brawley Z, Son DH, Sheldon MT. Active Tuning of Plasmon Damping via Light Induced Magnetism. NANO LETTERS 2022; 22:5120-5126. [PMID: 35759697 DOI: 10.1021/acs.nanolett.2c00571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Circularly polarized optical excitation of plasmonic nanostructures causes coherent circulating motion of their electrons, which in turn gives rise to strong optically induced magnetization, a phenomenon known as the inverse Faraday effect (IFE). In this study we report how the IFE also significantly decreases plasmon damping. By modulating the optical polarization state incident on achiral plasmonic nanostructures from linear to circular, we observe reversible increases of reflectance by up to 8% and simultaneous increases of optical field concentration by 35.7% under 109 W/m2 continuous wave (CW) optical excitation. These signatures of decreased plasmon damping were also monitored in the presence of an external magnetic field (0.2 T). We rationalize the observed decreases in plasmon damping in terms of the Lorentz forces acting on the circulating electron trajectories. Our results outline strategies for actively modulating intrinsic losses in the metal via optomagnetic effects encoded in the polarization state of incident light.
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Affiliation(s)
- Oscar Hsu-Cheng Cheng
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Boqin Zhao
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Zachary Brawley
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Dong Hee Son
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
- Center for Nanomedicine, Institute for Basic Science and Graduate Program of Nano Biomedical Engineering, Advanced Science Institute, Yonsei University, Seoul 03722, Republic of Korea
| | - Matthew T Sheldon
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
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11
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Muzzi B, Albino M, Gabbani A, Omelyanchik A, Kozenkova E, Petrecca M, Innocenti C, Balica E, Lavacchi A, Scavone F, Anceschi C, Petrucci G, Ibarra A, Laurenzana A, Pineider F, Rodionova V, Sangregorio C. Star-Shaped Magnetic-Plasmonic Au@Fe 3O 4 Nano-Heterostructures for Photothermal Therapy. ACS APPLIED MATERIALS & INTERFACES 2022; 14:29087-29098. [PMID: 35708301 PMCID: PMC9247976 DOI: 10.1021/acsami.2c04865] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 06/03/2022] [Indexed: 05/19/2023]
Abstract
Here, we synthesize a Au@Fe3O4 core@shell system with a highly uniform unprecedented star-like shell morphology with combined plasmonic and magnetic properties. An advanced electron microscopy characterization allows assessing the multifaceted nature of the Au core and its role in the growth of the peculiar epitaxial star-like shell with excellent crystallinity and homogeneity. Magnetometry and magneto-optical spectroscopy revealed a pure magnetite shell, with a superior saturation magnetization compared to similar Au@Fe3O4 heterostructures reported in the literature, which is ascribed to the star-like morphology, as well as to the large thickness of the shell. Of note, Au@Fe3O4 nanostar-loaded cancer cells displayed magneto-mechanical stress under a low frequency external alternating magnetic field (few tens of Hz). On the other hand, such a uniform, homogeneous, and thick magnetite shell enables the shift of the plasmonic resonance of the Au core to 640 nm, which is the largest red shift achievable in Au@Fe3O4 homogeneous core@shell systems, prompting application in photothermal therapy and optical imaging in the first biologically transparent window. Preliminary experiments performing irradiation of a stable water suspension of the nanostar and Au@Fe3O4-loaded cancer cell culture suspension at 658 nm confirmed their optical response and their suitability for photothermal therapy. The outstanding features of the prepared system can be thus potentially exploited as a multifunctional platform for magnetic-plasmonic applications.
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Affiliation(s)
- Beatrice Muzzi
- Institute
of Chemistry of Organometallic Compounds − C.N.R., 50019 Sesto Fiorentino
(FI), Italy
- Department
of Biotechnology, Chemistry and Pharmacy, University of Siena 1240, I-53100 Siena, Italy
| | - Martin Albino
- Institute
of Chemistry of Organometallic Compounds − C.N.R., 50019 Sesto Fiorentino
(FI), Italy
- Department
of Chemistry ‘Ugo Schiff’ & INSTM, University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Alessio Gabbani
- Institute
of Chemistry of Organometallic Compounds − C.N.R., 50019 Sesto Fiorentino
(FI), Italy
- Department
of Chemistry and Industrial Chemistry & INSTM, University of Pisa, 56126 Pisa, Italy
| | - Alexander Omelyanchik
- Institute
of Physics, Mathematics and Information Technology, Immanuel Kant Baltic Federal University, 236008 Kaliningrad, Russia
| | - Elena Kozenkova
- Institute
of Physics, Mathematics and Information Technology, Immanuel Kant Baltic Federal University, 236008 Kaliningrad, Russia
| | - Michele Petrecca
- Department
of Chemistry ‘Ugo Schiff’ & INSTM, University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Claudia Innocenti
- Institute
of Chemistry of Organometallic Compounds − C.N.R., 50019 Sesto Fiorentino
(FI), Italy
| | - Elena Balica
- Department
of Chemistry ‘Ugo Schiff’ & INSTM, University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Alessandro Lavacchi
- Institute
of Chemistry of Organometallic Compounds − C.N.R., 50019 Sesto Fiorentino
(FI), Italy
| | - Francesca Scavone
- Department
of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Firenze, Italy
| | - Cecilia Anceschi
- Department
of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Firenze, Italy
| | - Gaia Petrucci
- Department
of Chemistry and Industrial Chemistry & INSTM, University of Pisa, 56126 Pisa, Italy
| | - Alfonso Ibarra
- Laboratorio
de Microscopias Avanzadas (LMA), Universidad
de Zaragoza, 50018 Zaragoza, Spain
| | - Anna Laurenzana
- Department
of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Firenze, Italy
| | - Francesco Pineider
- Department
of Chemistry and Industrial Chemistry & INSTM, University of Pisa, 56126 Pisa, Italy
| | - Valeria Rodionova
- Institute
of Physics, Mathematics and Information Technology, Immanuel Kant Baltic Federal University, 236008 Kaliningrad, Russia
| | - Claudio Sangregorio
- Institute
of Chemistry of Organometallic Compounds − C.N.R., 50019 Sesto Fiorentino
(FI), Italy
- Department
of Chemistry ‘Ugo Schiff’ & INSTM, University of Florence, 50019 Sesto Fiorentino (FI), Italy
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12
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Yin P, Chen S, Radovanovic PV. Properties of Free Charge Carriers Govern Exciton Polarization in Plasmonic Semiconductor Nanocrystals. J Phys Chem Lett 2022; 13:5545-5552. [PMID: 35695871 DOI: 10.1021/acs.jpclett.2c00857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Interaction between a plasmon, as a collective property of charge carriers, and electronic or spin states in complex nanostructures has emerged as one of the fascinating topics that intertwines the fields of photonics, optoelectronics, and spintronics. Here, we investigate the magneto-optical properties of plasmonic InN and Cu2-xSe nanocrystals and show that the complete exciton polarization induced by cyclotron motion of free carriers is a universal phenomenon in semiconductor nanocrystals. The selective exciton polarization is governed by the angular momentum transfer from the carriers following cyclotron orbits to the excited electronic band states and can be controlled by carrier type (electrons or holes), mass, and velocity. The results of this work demonstrate the free-carrier-induced control of the states around the Fermi level and the exciton polarization in technologically important III-V nanocrystals, allowing for new ways of tailoring quantum states for spintronic and optoelectronic applications.
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Affiliation(s)
- Penghui Yin
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Shuoyuan Chen
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Pavle V Radovanovic
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
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13
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Lin JX, Chen YR, Sun SJ, Hu CK, Chen BJ, Hsu HS. Field-Free Magnetoplasmon-Induced Ultraviolet Circular Dichroism Switching in Premagnetized Magnetic Nanowires. ACS APPLIED MATERIALS & INTERFACES 2022; 14:11895-11902. [PMID: 35191691 DOI: 10.1021/acsami.1c23505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Broadband modulation of magnetic circular dichroism (MCD) using a relatively low magnetic field or by producing a field-free magnetoplasmonic effect in the remnant magnetic state was achieved by the integration of the noble metals (NMs) Au and Ag and the perpendicular magnetic anisotropy of Co with ZnO nanowires (NWs) used as the template. The samples containing NMs revealed MCD sign reversals and enhancements when compared with the original Co/ZnO NWs. The magnetoplasmonic effect of Au close to the visible light spectrum could induce the CD change in the visible region. Notably, the ultraviolet (UV) CD in Ag/Co/ZnO NWs is 12.5 times larger under a magnetic field (∼0.2 T) and 10 times greater in the remnant state (field-free) than those of the original Co/ZnO NWs because of the magnetoplasmonic effect of Ag in the UV spectrum. These results are attributable to the coupling of the remnant magnetic state of Co magnetization, the magnetoplasmons of the NMs, and the excitons of the ZnO NWs. The findings are potentially applicable in magneto-optical recording, biosensing, and energy contexts involving magnetoplasmonic functionalization.
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Affiliation(s)
- Jun-Xiao Lin
- Department of Applied Physics, National Pingtung University, 4-18, Minsheng Road, Pingtung 90044, Taiwan, ROC
| | - Yu-Ren Chen
- Department of Applied Physics, National Pingtung University, 4-18, Minsheng Road, Pingtung 90044, Taiwan, ROC
| | - Shih-Jye Sun
- Department of Applied Physics, National University of Kaohsiung, 700, Kaohsiung University Road, Kaohsiung 81148, Taiwan, ROC
| | - Chun-Kai Hu
- Department of Applied Physics, National Pingtung University, 4-18, Minsheng Road, Pingtung 90044, Taiwan, ROC
| | - Bo-Jun Chen
- Department of Applied Physics, National Pingtung University, 4-18, Minsheng Road, Pingtung 90044, Taiwan, ROC
| | - Hua-Shu Hsu
- Department of Applied Physics, National Pingtung University, 4-18, Minsheng Road, Pingtung 90044, Taiwan, ROC
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14
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Kumar TSJ, Arumugam M. Optical Properties of Magnetic Nanoalloys and Nanocomposites. HANDBOOK OF MAGNETIC HYBRID NANOALLOYS AND THEIR NANOCOMPOSITES 2022:547-573. [DOI: 10.1007/978-3-030-90948-2_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
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15
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Kumar TSJ, Arumugam M. Optical Properties of Magnetic Nanoalloys and Nanocomposites. HANDBOOK OF MAGNETIC HYBRID NANOALLOYS AND THEIR NANOCOMPOSITES 2022:1-27. [DOI: 10.1007/978-3-030-34007-0_18-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 02/25/2022] [Indexed: 06/16/2023]
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16
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Kuttruff J, Gabbani A, Petrucci G, Zhao Y, Iarossi M, Pedrueza-Villalmanzo E, Dmitriev A, Parracino A, Strangi G, De Angelis F, Brida D, Pineider F, Maccaferri N. Magneto-Optical Activity in Nonmagnetic Hyperbolic Nanoparticles. PHYSICAL REVIEW LETTERS 2021; 127:217402. [PMID: 34860084 DOI: 10.1103/physrevlett.127.217402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 09/23/2021] [Indexed: 06/13/2023]
Abstract
Active nanophotonics can be realized by controlling the optical properties of materials with external magnetic fields. Here, we explore the influence of optical anisotropy on the magneto-optical activity in nonmagnetic hyperbolic nanoparticles. We demonstrate that the magneto-optical response is driven by the hyperbolic dispersion via the coupling of metallic-induced electric and dielectric-induced magnetic dipolar optical modes with static magnetic fields. Magnetic circular dichroism experiments confirm the theoretical predictions and reveal tunable magneto-optical activity across the visible and near infrared spectral range.
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Affiliation(s)
- Joel Kuttruff
- Department of Physics and Materials Science, University of Luxembourg, 162a avenue de la Faincerie, 1511, Luxembourg, Luxembourg
- Department of Physics, University of Konstanz, Universitaetsstrasse 10, 78464 Konstanz, Germany
| | - Alessio Gabbani
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi 13, 56124, Pisa, Italy
| | - Gaia Petrucci
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi 13, 56124, Pisa, Italy
| | - Yingqi Zhao
- Plasmon Nanotechnologies Unit, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Marzia Iarossi
- Plasmon Nanotechnologies Unit, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
- Dipartimento di Informatica, Bioingegneria, Robotica e Ingegneria dei Sistemi (DIBRIS). Università degli Studi di Genova, Via Balbi 5, 16126 Genova, Italy
| | - Esteban Pedrueza-Villalmanzo
- Department of Physics, University of Gothenburg, Universitetsplatsen 1, 405 30, Gothenburg, Sweden
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemigården 4, 412 96 Göteborg, Sweden
| | - Alexandre Dmitriev
- Department of Physics, University of Gothenburg, Universitetsplatsen 1, 405 30, Gothenburg, Sweden
| | - Antonietta Parracino
- Department of Chemistry, Uppsala University, Husargatan 3, 752 37, Uppsala, Sweden
| | - Giuseppe Strangi
- Department of Physics, Case Western Reserve University, 10600 Euclid Avenue, 44106, Cleveland, Ohio, USA
- CNR-NANOTEC Istituto di Nanotecnologia and Department of Physics, University of Calabria, Via Pietro Bucci 87036, Rende, Italy
| | - Francesco De Angelis
- Plasmon Nanotechnologies Unit, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Daniele Brida
- Department of Physics and Materials Science, University of Luxembourg, 162a avenue de la Faincerie, 1511, Luxembourg, Luxembourg
| | - Francesco Pineider
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi 13, 56124, Pisa, Italy
| | - Nicolò Maccaferri
- Department of Physics and Materials Science, University of Luxembourg, 162a avenue de la Faincerie, 1511, Luxembourg, Luxembourg
- Department of Physics, Umeå University, Linnaeus väg 20, 907 36 Umeå, Sweden
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17
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Optical and magneto-optical properties of rhodium nanostructures with different morphologies: Insight into the absorption bump in the UV region. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Gabbani A, Fantechi E, Petrucci G, Campo G, de Julián Fernández C, Ghigna P, Sorace L, Bonanni V, Gurioli M, Sangregorio C, Pineider F. Dielectric Effects in FeO x -Coated Au Nanoparticles Boost the Magnetoplasmonic Response: Implications for Active Plasmonic Devices. ACS APPLIED NANO MATERIALS 2021; 4:1057-1066. [PMID: 33778418 PMCID: PMC7992377 DOI: 10.1021/acsanm.0c02588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 12/31/2020] [Indexed: 05/15/2023]
Abstract
Plasmon resonance modulation with an external magnetic field (magnetoplasmonics) represents a promising route for the improvement of the sensitivity of plasmon-based refractometric sensing. To this purpose, an accurate material choice is needed to realize hybrid nanostructures with an improved magnetoplasmonic response. In this work, we prepared core@shell nanostructures made of an 8 nm Au core surrounded by an ultrathin iron oxide shell (≤1 nm). The presence of the iron oxide shell was found to significantly enhance the magneto-optical response of the noble metal in the localized surface plasmon region, compared with uncoated Au nanoparticles. With the support of an analytical model, we ascribed the origin of the enhancement to the shell-induced increase in the dielectric permittivity around the Au core. The experiment points out the importance of the spectral position of the plasmonic resonance in determining the magnitude of the magnetoplasmonic response. Moreover, the analytical model proposed here represents a powerful predictive tool for the quantification of the magnetoplasmonic effect based on resonance position engineering, which has significant implications for the design of active magnetoplasmonic devices.
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Affiliation(s)
- Alessio Gabbani
- INSTM
and Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Elvira Fantechi
- INSTM
and Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Gaia Petrucci
- INSTM
and Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Giulio Campo
- INSTM
and Department of Chemistry “U. Schiff”, Università degli Studi di Firenze, via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | | | - Paolo Ghigna
- Department
of Chemistry, Università di Pavia, Via T. Taramelli 12, 27100 Pavia, Italy
| | - Lorenzo Sorace
- INSTM
and Department of Chemistry “U. Schiff”, Università degli Studi di Firenze, via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Valentina Bonanni
- INSTM
and Department of Chemistry “U. Schiff”, Università degli Studi di Firenze, via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Massimo Gurioli
- Department
of Physics and Astronomy, Università
degli Studi di Firenze, via G. Sansone 1, 50019 Sesto Fiorentino (FI), Italy
| | - Claudio Sangregorio
- INSTM
and Department of Chemistry “U. Schiff”, Università degli Studi di Firenze, via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
- CNR-ICCOM, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy
| | - Francesco Pineider
- INSTM
and Department of Chemistry and Industrial Chemistry, Università di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
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19
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Han B, Gao X, Lv J, Tang Z. Magnetic Circular Dichroism in Nanomaterials: New Opportunity in Understanding and Modulation of Excitonic and Plasmonic Resonances. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1801491. [PMID: 30345582 DOI: 10.1002/adma.201801491] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 08/16/2018] [Indexed: 06/08/2023]
Abstract
The unique capability of magnetic circular dichroism (MCD) in revealing geometry and electronic information has provided new opportunities in exploring the relationship between structure and magneto-optical properties in nanomaterials with extraordinary optical absorption. Here, the representative studies referring to application of the MCD technique in semiconductor and noble metal nanomaterials are overviewed. MCD is powerful in elucidating the structural information of the excitonic transition in semiconductor nanocrystals, electronic transitions in noble metal nanoclusters, and plasmon resonance in noble metal nanostructures. By virtue of these advantages, the MCD technique shows its unrivalled ability in evaluating the magnetic modulation of excitonic and plasmonic optical activity of nanomaterials with varied chemical composition, geometry, assembly conformation, and coupling effect. Knowledge of the key factors in manipulating magneto-optical properties at the nanoscale acquired with the MCD technique will largely boost the application of semiconductor and noble nanomaterials in the fields of sensing, spintronic, nanophotonics, etc.
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Affiliation(s)
- Bing Han
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Xiaoqing Gao
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Jiawei Lv
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Zhiyong Tang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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20
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Yin P, Radovanovic PV. Magnetoplasmon Resonances in Semiconductor Nanocrystals: Potential for a New Information Technology Platform. CHEMSUSCHEM 2020; 13:4885-4893. [PMID: 32681689 DOI: 10.1002/cssc.202001468] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Indexed: 06/11/2023]
Abstract
Interaction between light and plasmon oscillations in semiconductor nanocrystals has received significant attention in recent years driven, in part, by the possibility of coupling between plasmonic and semiconducting properties. Such coupling could lead to a variety of new applications in plasmonics, photonics, and optoelectronics. In this Concept we discuss the methods for generation of localized surface plasmon resonances in colloidal semiconductor nanocrystals and their unique magneto-optical properties. Different means of introducing free charge carriers, including aliovalent doping, non-stoichiometry, and external charging, are first compared and contrasted. The resulting plasmons can be manipulated using circularly polarized light and external magnetic field, allowing for the formation of the magnetoplasmon modes. The concept of using these magnetoplasmon modes as a new degree of freedom for controlling excitonic states and charge-carrier polarization is introduced and discussed. We also highlight some notable recent examples of controlling plasmon-exciton interactions and comment on their implications for future research in sustainable information technology.
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Affiliation(s)
- Penghui Yin
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Pavle V Radovanovic
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
- Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
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21
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Bornacelli J, Torres-Torres C, Arenas-Alatorre J, Martínez-Mondragón MM, Rodríguez-Fernández L, Oliver A. Enhanced ultrafast optomagnetic effects in room-temperature ferromagnetic Pt nanoclusters embedded in silica by ion implantation. NANOTECHNOLOGY 2020; 31:355705. [PMID: 32422622 DOI: 10.1088/1361-6528/ab93ec] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ferromagnetic-like behavior at room temperature (300 K) was observed in Pt particles embedded in ion-implanted silica matrices. Results in samples integrated by ultra-small photoluminescent Pt clusters (<2 nm) were compared with samples containing exclusively larger plasmonic Pt nanoparticles (>3 nm). The ferromagnetic behavior coexists simultaneously with a diamagnetic response. Enhanced diamagnetic response of one order of magnitude was observed compared to typical diamagnetism in pure silica, and it is increased with the mean diameter of the Pt particles. Besides, a larger sensitivity to an external field was observed in the ferromagnetic response of the nanostructures with a characteristic saturation at 20 kOe. This ferromagnetic behavior was only observed in the samples with nucleated Pt particles. The magnitude of the saturation magnetization shows up to a fivefold increase in the samples with smaller particle size and larger particle density. Saturation magnetization was observed between 3-15 × 10-4 emu g-1, with remanent magnetization of 0.2-0.6 × 10-4emu g-1, measured at 300 K. Coercitive fields also decrease in samples with smaller size and particles density, with values of 114 and 300 Oe. At lower temperatures (5 K) the saturation magnetization increases, as it would be expected from a ferromagnetic state. Optomagnetic response was studied by inverse Faraday effects and induced photomagnetization with circular polarized picosecond pulsed light at 1064 nm wavelength. Results showed that samples with a stronger ferromagnetic response exhibit larger Faraday rotation up to 5.3 × 103deg cm-1 by light excitations with irradiances between 50 and 180 GW cm-2. These findings have immediate applications in multifunctional solid-state magneto-optical devices such as optical isolators, high-data storage devices and ultrafast all-optical switching of magnetization.
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Affiliation(s)
- J Bornacelli
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Ingeniería Mecánica y Eléctrica, Unidad Zacatenco, Instituto Politécnico Nacional, Ciudad de México 07738, México
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22
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Characterisation and Manipulation of Polarisation Response in Plasmonic and Magneto-Plasmonic Nanostructures and Metamaterials. Symmetry (Basel) 2020. [DOI: 10.3390/sym12081365] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Optical properties of metal nanostructures, governed by the so-called localised surface plasmon resonance (LSPR) effects, have invoked intensive investigations in recent times owing to their fundamental nature and potential applications. LSPR scattering from metal nanostructures is expected to show the symmetry of the oscillation mode and the particle shape. Therefore, information on the polarisation properties of the LSPR scattering is crucial for identifying different oscillation modes within one particle and to distinguish differently shaped particles within one sample. On the contrary, the polarisation state of light itself can be arbitrarily manipulated by the inverse designed sample, known as metamaterials. Apart from polarisation state, external stimulus, e.g., magnetic field also controls the LSPR scattering from plasmonic nanostructures, giving rise to a new field of magneto-plasmonics. In this review, we pay special attention to polarisation and its effect in three contrasting aspects. First, tailoring between LSPR scattering and symmetry of plasmonic nanostructures, secondly, manipulating polarisation state through metamaterials and lastly, polarisation modulation in magneto-plasmonics. Finally, we will review recent progress in applications of plasmonic and magneto-plasmonic nanostructures and metamaterials in various fields.
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23
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Extraction of magnetic circular dichroism effects from blended mixture of magnetic linear dichroism signals in the cobalt/Scotch tape system. Sci Rep 2019; 9:17192. [PMID: 31748587 PMCID: PMC6868135 DOI: 10.1038/s41598-019-53880-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Accepted: 11/06/2019] [Indexed: 01/23/2023] Open
Abstract
Circular dichroism (CD) signals revealed in some materials may arise from different origins during measurements. Magnetic field dependent CD (MCD) emanating from the spin-polarized band provides direct insight into the spin-spin interband transitions in magnetic materials. On the contrary, natural CD effects which are artefactual signals resulting from the linear polarization (LP) components during the polarization modulation with a photo-elastic modulator in anisotropic polymer systems were usually observed. There is no simple method to reliably distinguish MCD effect due to spin polarized band structures from natural CD effect, which limits our understanding of the magnetic material/polymer hybrid structures. This paper aims to introduce a general strategy of averaging out the magnetic linear dichroism (MLD) contributions due to the anisotropic structure and disentangling MCD signal(s) from natural MCD signal(s). We demonstrate the effectiveness of separating MCD from natural MCD using rotational MCD measurement and presented the results of a sample with Co thin film on polymer Scotch tape (unplasticized polyvinyl chloride) glued on a quartz substrate. We demonstrate that the proposed method can be used as an effective tool in disentangling MCD and natural MCD effects, and it opens prospects to study the magnetic material /polymer hybrid systems.
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24
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Melnikau D, Govyadinov AA, Sánchez-Iglesias A, Grzelczak M, Nabiev IR, Liz-Marzán LM, Rakovich YP. Double Rabi Splitting in a Strongly Coupled System of Core-Shell Au@Ag Nanorods and J-Aggregates of Multiple Fluorophores. J Phys Chem Lett 2019; 10:6137-6143. [PMID: 31557038 DOI: 10.1021/acs.jpclett.9b01988] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The interaction of several components in the strong coupling regime yielding multiple Rabi splittings opens up remarkable possibilities for studies of multimode hybridization and energy transfer, which is of considerable interest in both fundamental and applied science. Here we demonstrate that three different components, such as core-shell Au@Ag nanorods and J-aggregates of two different dyes, can be integrated into a single hybrid structure, which leads to strong collective exciton-plasmon coupling and double-mode Rabi splitting totaling 338 meV. We demonstrate strong coupling in these multicomponent plexitonic nanostructures by means of magnetic circular dichroism spectroscopy and demonstrate strong magneto-optical activity for the three hybridized states resulting from this coupling. The J-aggregates of two different nonmagnetic dyes interact with metal nanoparticles effectively, achieving magnetic properties due to the hybridization of electronic excitations in the three-component system.
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Affiliation(s)
- Dzmitry Melnikau
- CIC NanoGUNE , Ave. Tolosa 76 , 20018 Donostia-San Sebastian , Spain
- National University of Ireland Galway , University Road , H91 TK33 Galway , Ireland
| | | | - Ana Sánchez-Iglesias
- CIC biomaGUNE , Paseo de Miramón 182 , 20014 Donostia-San Sebastián , Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine, Ciber-BBN , Paseo de Miramón 182 , 20014 Donostia-San Sebastián , Spain
| | - Marek Grzelczak
- Donostia International Physics Center (DIPC) , Paseo Manuel de Lardizabal 4 , 20018 Donostia-San Sebastián , Spain
- IKERBASQUE, Basque Foundation for Science , Maria Díaz de Haro 3 , 48013 Bilbao , Spain
| | - Igor R Nabiev
- Laboratoire de Recherche en Nanosciences, LRN-EA4682 , Université de Reims Champagne-Ardenne , 51100 Reims , France
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) , 115409 Moscow , Russian Federation
| | - Luis M Liz-Marzán
- CIC biomaGUNE , Paseo de Miramón 182 , 20014 Donostia-San Sebastián , Spain
- IKERBASQUE, Basque Foundation for Science , Maria Díaz de Haro 3 , 48013 Bilbao , Spain
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) , 115409 Moscow , Russian Federation
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine, Ciber-BBN , Paseo de Miramón 182 , 20014 Donostia-San Sebastián , Spain
| | - Yury P Rakovich
- Donostia International Physics Center (DIPC) , Paseo Manuel de Lardizabal 4 , 20018 Donostia-San Sebastián , Spain
- IKERBASQUE, Basque Foundation for Science , Maria Díaz de Haro 3 , 48013 Bilbao , Spain
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) , 115409 Moscow , Russian Federation
- Centro de Física de Materiales (MPC, CSIC-UPV/EHU) and Departamento de Física de Materiales , UPV-EHU , Paseo Manuel de Lardizabal 5 , 20018 Donostia-San Sebastián , Spain
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25
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Application of magnetic circular dichroism (MCD) to morphological quality evaluation of silver nanodecahedra. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136637] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Yin P, Hegde M, Garnet NS, Tan Y, Radovanovic PV. Faceting-Controlled Zeeman Splitting in Plasmonic TiO 2 Nanocrystals. NANO LETTERS 2019; 19:6695-6702. [PMID: 31448925 DOI: 10.1021/acs.nanolett.9b03128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Dynamic manipulation of discrete states in nanostructured materials is critical for emerging quantum technologies. However, this process often requires a correlation of mutually competing degrees of freedom. Here we report the control of magnetic-field-induced excitonic splitting in colloidal TiO2 nanocrystals by control of their faceting. By changing nanocrystal morphology via reaction conditions, we control the concentration and location of oxygen vacancies, which can generate localized surface plasmon resonance and foster the reduction of lattice cations leading to the emergence of individual or exchange-coupled Ti(III) centers with high net-spin states. These species can all couple with the nanocrystal lattice under different conditions resulting in distinctly patterned excitonic Zeeman splitting and selective control of conduction band states in an external magnetic field. This work demonstrates the concept of using nanocrystal morphology to control carrier polarization in individual nanocrystals using both intrinsic and collective electronic properties, representing a unique approach to multifunctionality in reduced dimensions.
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Affiliation(s)
- Penghui Yin
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontairo N2L 3G1 , Canada
| | - Manu Hegde
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontairo N2L 3G1 , Canada
| | - Natalie S Garnet
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontairo N2L 3G1 , Canada
| | - Yi Tan
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontairo N2L 3G1 , Canada
| | - Pavle V Radovanovic
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontairo N2L 3G1 , Canada
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27
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Liu JQ, Wu S, Wang P, Wang QK, Xie YB, Sun GH, Zhou YX. Enhanced magnetic circular dichroism by subradiant plasmonic mode in symmetric graphene oligomers at low static magnetic fields. OPTICS EXPRESS 2019; 27:567-575. [PMID: 30696141 DOI: 10.1364/oe.27.000567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 01/03/2019] [Indexed: 06/09/2023]
Abstract
Giant magnetic circular dichroism (MCD) that shows a different response to incident wave with left or right-handed circular polarization under external magnetic field is promising for magneto-optical sensing, revealing symmetry and degeneracy information of electronic states. However, traditional methods and materials that are used to obtain significant MCD involve highly strong external magnetic field. Based on the excitation of subradiant plasmonic mode and Fano resonance in graphene oligomers in the mid-infrared region, we numerically demonstrate that MCD is enhanced three times larger than the previously reported method, based on the resonance of electric dipole plasmonic mode. This giant MCD is attributed to the remarkably different excitation efficiency of subdradiant plasmonic mode due to the interparticle coupling under left or right-handed circular polarization incidence and external magnetic field. Our results offer an effective mechanism to enhance MCD signal at the nanoscale, which facilitates the sensing, spintronic, nanophotonics and other such fields.
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28
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Yin P, Hegde M, Tan Y, Chen S, Garnet N, Radovanovic PV. Controlling the Mechanism of Excitonic Splitting in In 2O 3 Nanocrystals by Carrier Delocalization. ACS NANO 2018; 12:11211-11218. [PMID: 30335948 DOI: 10.1021/acsnano.8b05782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Degenerately doped metal oxide nanocrystals have emerged as infrared plasmonic materials with promising applications in optoelectronics, surface-enhanced infrared spectroscopies, and sensing. They also have potential for technological applications in electronics and photonics owing to the possibility of coupling between plasmon and exciton in the absence of a heterojunction. Here, we demonstrate the control of excitonic splitting in In2O3 nanocrystals upon excitation with circularly polarized light in an external magnetic field by simultaneous control of the electronic structure of donor defects and the nanocrystal host lattice. Using variable-temperature-variable-field magnetic circular dichroism spectroscopy, we show that the nanocrystal band splitting has two distinct contributions in plasmonic In2O3 nanocrystals. Temperature-independent splitting arises from the cyclotron magnetoplasmonic modes, which impart angular momentum to the conduction band excited states near the Fermi level, and increases with the intensity of the corresponding plasmon resonance. Temperature-dependent splitting is associated with the localized electron spins trapped in defect states. The ratio of the two components can be controlled by the formation of oxygen vacancies or introduction of aliovalent dopants. Using these experimental results in conjunction with the density functional theory modeling, relative contribution of the two mechanisms is discussed in the context of the perturbation theory taking into account energy separation between the nanocrystal excited states and the localized defect states. The results of this work demonstrate the ability to control carrier polarization in nonmagnetic metal oxide nanocrystals using both individual and collective electronic properties and allow for their application as an emerging class of multifunctional materials with strongly interacting degrees of freedom.
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Affiliation(s)
- Penghui Yin
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontario N2L 3G1 , Canada
| | - Manu Hegde
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontario N2L 3G1 , Canada
| | - Yi Tan
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontario N2L 3G1 , Canada
| | - Shuoyuan Chen
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontario N2L 3G1 , Canada
| | - Natalie Garnet
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontario N2L 3G1 , Canada
| | - Pavle V Radovanovic
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontario N2L 3G1 , Canada
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29
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Floess D, Giessen H. Nonreciprocal hybrid magnetoplasmonics. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2018; 81:116401. [PMID: 30270847 DOI: 10.1088/1361-6633/aad6a8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The Faraday effect describes the phenomenon that a magnetized material can alter the polarization state of transmitted light. Interestingly, unlike most light-matter interactions in nature, it breaks Lorentz reciprocity. This exceptional behavior is utilized for applications such as optical isolators, which are core elements in communication and laser systems. While there is high demand for sub-micron nonreciprocal photonic devices, the realization of such systems is extremely challenging as conventional magneto-optic materials only provide weak magneto-optic response within small volumes. Plasmonics could be a key to overcome this hurdle in the future: over the last years there have been several lines of work demonstrating that different types of metallic nanostrutures can be utilized to greatly enhance the magneto-optic response of conventional materials. In this review we give an overview over the state of the art in the field and highlight recent developments on hybrid plasmonic Faraday rotators. Our discussions are mainly focused on the visible and near-infrared wavelength regions and cover both experimental realizations as well as analytical descriptions. Special attention will be paid to recent developments on hybrid plasmonic thin film systems consisting of gold and europium chalcogenides.
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Affiliation(s)
- Dominik Floess
- 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Stuttgart 70569, Germany
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30
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Magneto-Optical properties of noble-metal nanostructures: functional nanomaterials for bio sensing. Sci Rep 2018; 8:12640. [PMID: 30139943 PMCID: PMC6107575 DOI: 10.1038/s41598-018-30862-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 08/02/2018] [Indexed: 11/13/2022] Open
Abstract
Metallic nanostructures supporting Localized Surface Plasmon Resonances (LSPR) are characterized by their unique ability to control and manipulate light at the nanoscale. Noble metal nanostructures, such as gold nanostructures, are demonstrating to exhibit magneto-optic activity in the presence of modulated magnetic field of low intensity in transversal configuration (T-MOKE). Validation of experimental findings was achieved by numerical simulations based on Finite Element Method (FEM) techniques. The developed numerical models allowed studying the combination of the T-MOKE effect with the localized surface plasmon resonance of metal nanoparticles. Numerical optical and magneto-optical spectra provided a deep insight on the physical aspects behind the magneto-optical activity of metal nanostructures strictly related to direction of oscillations electrical dipoles generated in resonance conditions. Additionally the MO signal was characterized as a transducing signal for refractive index sensing in liquid conditions. The outcome is an increase in the limit of detection of magneto optical transducer with respect to traditional plasmonic sensors. A new strategy for magneto-plasmonic sensing based on the use of glass supported -Au nanostructures based on their MO properties has put forward.
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31
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Shiratsu T, Yao H. Magnetic circular dichroism (MCD) in silver nanocubes with different sizes. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.07.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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32
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Checkpoint for helicity conservation in fluorescence at the nanoscale: Energy and helicity transfer (hFRET) from a rotating donor dipole. Biophys Chem 2018; 239:38-53. [DOI: 10.1016/j.bpc.2018.05.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 05/13/2018] [Accepted: 05/14/2018] [Indexed: 11/20/2022]
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33
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Kapaklis V. Magnetizing semiconductors with light. NATURE NANOTECHNOLOGY 2018; 13:438-439. [PMID: 29686290 DOI: 10.1038/s41565-018-0119-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- Vassilios Kapaklis
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden.
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34
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Yin P, Tan Y, Fang H, Hegde M, Radovanovic PV. Plasmon-induced carrier polarization in semiconductor nanocrystals. NATURE NANOTECHNOLOGY 2018; 13:463-467. [PMID: 29686293 DOI: 10.1038/s41565-018-0096-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 02/14/2018] [Indexed: 06/08/2023]
Abstract
Spintronics 1 and valleytronics 2 are emerging quantum electronic technologies that rely on using electron spin and multiple extrema of the band structure (valleys), respectively, as additional degrees of freedom. There are also collective properties of electrons in semiconductor nanostructures that potentially could be exploited in multifunctional quantum devices. Specifically, plasmonic semiconductor nanocrystals3-10 offer an opportunity for interface-free coupling between a plasmon and an exciton. However, plasmon-exciton coupling in single-phase semiconductor nanocrystals remains challenging because confined plasmon oscillations are generally not resonant with excitonic transitions. Here, we demonstrate a robust electron polarization in degenerately doped In2O3 nanocrystals, enabled by non-resonant coupling of cyclotron magnetoplasmonic modes 11 with the exciton at the Fermi level. Using magnetic circular dichroism spectroscopy, we show that intrinsic plasmon-exciton coupling allows for the indirect excitation of the magnetoplasmonic modes, and subsequent Zeeman splitting of the excitonic states. Splitting of the band states and selective carrier polarization can be manipulated further by spin-orbit coupling. Our results effectively open up the field of plasmontronics, which involves the phenomena that arise from intrinsic plasmon-exciton and plasmon-spin interactions. Furthermore, the dynamic control of carrier polarization is readily achieved at room temperature, which allows us to harness the magnetoplasmonic mode as a new degree of freedom in practical photonic, optoelectronic and quantum-information processing devices.
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Affiliation(s)
- Penghui Yin
- Department of Chemistry, University of Waterloo, Waterloo, ON, Canada
| | - Yi Tan
- Department of Chemistry, University of Waterloo, Waterloo, ON, Canada
| | - Hanbing Fang
- Department of Chemistry, University of Waterloo, Waterloo, ON, Canada
| | - Manu Hegde
- Department of Chemistry, University of Waterloo, Waterloo, ON, Canada
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35
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Yeom J, Santos US, Chekini M, Cha M, de Moura AF, Kotov NA. Chiromagnetic nanoparticles and gels. Science 2018; 359:309-314. [PMID: 29348234 DOI: 10.1126/science.aao7172] [Citation(s) in RCA: 146] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 12/04/2017] [Indexed: 12/21/2022]
Abstract
Chiral inorganic nanostructures have high circular dichroism, but real-time control of their optical activity has so far been achieved only by irreversible chemical changes. Field modulation is a far more desirable path to chiroptical devices. We hypothesized that magnetic field modulation can be attained for chiral nanostructures with large contributions of the magnetic transition dipole moments to polarization rotation. We found that dispersions and gels of paramagnetic Co3O4 nanoparticles with chiral distortions of the crystal lattices exhibited chiroptical activity in the visible range that was 10 times as strong as that of nonparamagnetic nanoparticles of comparable size. Transparency of the nanoparticle gels to circularly polarized light beams in the ultraviolet range was reversibly modulated by magnetic fields. These phenomena were also observed for other nanoscale metal oxides with lattice distortions from imprinted amino acids and other chiral ligands. The large family of chiral ceramic nanostructures and gels can be pivotal for new technologies and knowledge at the nexus of chirality and magnetism.
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Affiliation(s)
- Jihyeon Yeom
- Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA.,Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Uallisson S Santos
- Department of Chemistry, Federal University of São Carlos, 13.565-905, São Carlos, São Paulo, Brazil
| | - Mahshid Chekini
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA.,Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Minjeong Cha
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA.,Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - André F de Moura
- Department of Chemistry, Federal University of São Carlos, 13.565-905, São Carlos, São Paulo, Brazil.
| | - Nicholas A Kotov
- Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA.,Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA.,Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.,Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA.,Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
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36
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Shiratsu T, Yao H. Size dependence of magneto-optical activity in silver nanoparticles with dimensions between 10 and 60 nm studied by MCD spectroscopy. Phys Chem Chem Phys 2018; 20:4269-4276. [PMID: 29364294 DOI: 10.1039/c7cp07695a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Size-dependent magneto-optical activity in Ag nanoparticles with dimensions from 10 to 60 nm is demonstrated with magnetic circular dichroism (MCD) spectroscopy. The Ag nanoparticles are prepared on the basis of a seeded-growth strategy using sodium citrate and/or tannic acid as reducing agents in aqueous solution. The obtained nanoparticles are roughly spherical, but those larger than ∼28 nm have a slight diversity of shapes with quasi-spherical polyhedrons. They exhibit a derivative-like MCD response in the localized surface plasmon resonance (LSPR) region, which originates from two circular modes of surface magnetoplasmons. With an increase in the nanoparticle diameter, the bisignated MCD signal is strongly distorted and weakened. Such a distortion for large-sized Ag nanoparticles can be phenomenologically simulated on the basis of both spectral inhomogeneity and MCD signal lobe asymmetry. Then the maximum value of MCD amplitude (MCDmax), which is obtained by normalization of the amplitude to the LSPR peak absorbance, first increases with increasing particle diameter and then decreases with a maximum for the 23 nm nanoparticle. Interestingly, the MCDmax values are inversely correlated with the spectral bandwidth of LSPR extinction. This behaviour is discussed from a viewpoint of inhomogeneous effects of both spectral and size/shape distributions. We believe the present results will advance the design and application of optical devices based on magnetoplasmonics.
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Affiliation(s)
- Taisuke Shiratsu
- Division of Chemistry for Materials, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan.
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37
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Han B, Gao X, Shi L, Zheng Y, Hou K, Lv J, Guo J, Zhang W, Tang Z. Geometry-Modulated Magnetoplasmonic Optical Activity of Au Nanorod-Based Nanostructures. NANO LETTERS 2017; 17:6083-6089. [PMID: 28953401 DOI: 10.1021/acs.nanolett.7b02583] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Comprehension and modulation of optical activity at nanoscale have attracted tremendous interest in the past decades due to its potential application in many fields including chemical/biological sensing, artificial metamaterials, asymmetric catalysis, and so forth. As for the conventional molecular materials, magnetic field is among the most effective routes in inducing and manipulating their optical activity; whereas the magnetic optical activity at nanoscale calls for deeper understanding, especially for anisotropic noble metal nanoparticles. In this work, distinctly different magnetic circular dichroism (MCD) responses are demonstrated in gold nanorods (GNRs) with a derivative-shaped MCD signal corresponding to the transverse surface plasmon resonance (TSPR) band and a Gaussian-shaped signal at the position of the longitudinal surface plasmon resonance (LSPR) band. Furthermore, changing the aspect ratio of GNRs easily regulates such magnetoplasmonic CD response. More interestingly, GNR assemblies with different geometric configuration (end-to-end and side-by-side) show structure-sensitive magnetoplasmonic CD response. Armed with theoretical calculation, we clearly elucidate the intrinsic relationship of the resultant magnetoplasmonic CD response with the optical symmetry and geometry factor inside one-dimensional GNRs. This work not only greatly benefits our understanding toward the nature of SPR mode in anisotropic plasmonic nanostructures but also opens the way to achieve tunable magnetoplasmonic response, which will significantly advance the design and application of optical nanodevices.
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Affiliation(s)
- Bing Han
- College of Environmental Science and Engineering, North China Electric Power University , Beijing 102206, People's Republic of China
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, People's Republic of China
| | - Xiaoqing Gao
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, People's Republic of China
| | - Lin Shi
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, People's Republic of China
| | - Yonglong Zheng
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, People's Republic of China
| | - Ke Hou
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, People's Republic of China
| | - Jiawei Lv
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, People's Republic of China
| | - Jun Guo
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, People's Republic of China
| | - Wei Zhang
- Institute of Applied Physics and Computational Mathematics , Beijing 100088, People's Republic of China
| | - Zhiyong Tang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, People's Republic of China
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38
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Nadarajah A, Sheldon MT. Optoelectronic phenomena in gold metal nanostructures due to the inverse Faraday effect. OPTICS EXPRESS 2017; 25:12753-12764. [PMID: 28786629 DOI: 10.1364/oe.25.012753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 05/08/2017] [Indexed: 06/07/2023]
Abstract
The inverse Faraday effect (IFE) is an opto-magnetic phenomenon that produces static magnetic fields in a wide range of materials during illumination with circularly polarized light. This study analyzes non-magnetic gold (Au) metal nanostructures, providing insight into plasmonic enhancement of the magnetic and optoelectronic phenomena associated with the IFE. We report a simple numerical approach in combination with full-wave optical simulations (finite-difference time-domain method) for tracking the optically-induced motion of electrons inside plasmonic nanostructures that gives rise to the IFE. In addition to static magnetic fields, a circulating drift current is observed, where the direction of current is the same as the chirality of the circularly polarized light. Our results indicate a significant enhancement of this drift current by ~100 times in Au nanoparticles due to larger optical field gradients in comparison with bulk Au films. We also report on the size, geometry, and spectral dependence of the induced drift currents and static magnetic fields, which we predict can exceed 1×10-3 T under 1015 W m-2 optical intensity for spherical Au nanoparticles. Our results inform the development of new classes of magneto-optic and optoelectronic behavior that can be obtained via direct manipulation of electron dynamics by the optical fields inside metals.
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39
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Amendola V, Pilot R, Frasconi M, Maragò OM, Iatì MA. Surface plasmon resonance in gold nanoparticles: a review. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:203002. [PMID: 28426435 DOI: 10.1088/1361-648x/aa60f3] [Citation(s) in RCA: 565] [Impact Index Per Article: 80.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In the last two decades, plasmon resonance in gold nanoparticles (Au NPs) has been the subject of intense research efforts. Plasmon physics is intriguing and its precise modelling proved to be challenging. In fact, plasmons are highly responsive to a multitude of factors, either intrinsic to the Au NPs or from the environment, and recently the need emerged for the correction of standard electromagnetic approaches with quantum effects. Applications related to plasmon absorption and scattering in Au NPs are impressively numerous, ranging from sensing to photothermal effects to cell imaging. Also, plasmon-enhanced phenomena are highly interesting for multiple purposes, including, for instance, Raman spectroscopy of nearby analytes, catalysis, or sunlight energy conversion. In addition, plasmon excitation is involved in a series of advanced physical processes such as non-linear optics, optical trapping, magneto-plasmonics, and optical activity. Here, we provide the general overview of the field and the background for appropriate modelling of the physical phenomena. Then, we report on the current state of the art and most recent applications of plasmon resonance in Au NPs.
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Affiliation(s)
- Vincenzo Amendola
- Department of Chemical Sciences, University of Padova, via Marzolo 1, I-35131 Padova, Italy. Consorzio INSTM, UdR Padova, Italy
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40
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Hartstein KH, Schimpf AM, Salvador M, Gamelin DR. Cyclotron Splittings in the Plasmon Resonances of Electronically Doped Semiconductor Nanocrystals Probed by Magnetic Circular Dichroism Spectroscopy. J Phys Chem Lett 2017; 8:1831-1836. [PMID: 28379708 DOI: 10.1021/acs.jpclett.7b00494] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A fundamental understanding of the rich electronic structures of electronically doped semiconductor nanocrystals is vital for assessing the utility of these materials for future applications from solar cells to redox catalysis. Here, we examine the use of magnetic circular dichroism (MCD) spectroscopy to probe the infrared localized surface plasmon resonances of p-Cu2-xSe, n-ZnO, and tin-doped In2O3 (n-ITO) nanocrystals. We demonstrate that the MCD spectra of these nanocrystals can be analyzed by invoking classical cyclotron motions of their excess charge carriers, with experimental MCD signs conveying the carrier types (n or p) and experimental MCD intensities conveying the cyclotron splitting magnitudes. The experimental cyclotron splittings can then be used to quantify carrier effective masses (m*), with results that agree with bulk in most cases. MCD spectroscopy thus offers a unique measure of m* in free-standing colloidal semiconductor nanocrystals, raising new opportunities to investigate the influence of various other synthetic or environmental parameters on this fundamentally important electronic property.
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Affiliation(s)
- Kimberly H Hartstein
- Department of Chemistry, University of Washington , Seattle, Washington 98195-1700, United States
| | - Alina M Schimpf
- Department of Chemistry, University of Washington , Seattle, Washington 98195-1700, United States
| | - Michael Salvador
- Department of Chemistry, University of Washington , Seattle, Washington 98195-1700, United States
| | - Daniel R Gamelin
- Department of Chemistry, University of Washington , Seattle, Washington 98195-1700, United States
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41
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Melnikau D, Govyadinov AA, Sánchez-Iglesias A, Grzelczak M, Liz-Marzán LM, Rakovich YP. Strong Magneto-Optical Response of Nonmagnetic Organic Materials Coupled to Plasmonic Nanostructures. NANO LETTERS 2017; 17:1808-1813. [PMID: 28157323 PMCID: PMC5744660 DOI: 10.1021/acs.nanolett.6b05128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 01/25/2017] [Indexed: 06/06/2023]
Abstract
Plasmonic nanoparticles (PNPs) can significantly modify the optical properties of nearby organic molecules and thus present an attractive opportunity for sensing applications. However, the utilization of PNPs in conventional absorption, fluorescence, or Raman spectroscopy techniques is often ineffective due to strong absorption background and light scattering, particularly in the case of turbid solutions, cell suspensions, and biological tissues. Here we show that nonmagnetic organic molecules may exhibit magneto-optical response due to binding to a PNP. Specifically, we detect strong magnetic circular dichroism signal from supramolecular J-aggregates, a representative organic dye, upon binding to silver-coated gold nanorods. We explain this effect by strong coupling between the J-aggregate exciton and the nanoparticle plasmon, leading to the formation of a hybrid state in which the exciton effectively acquires magnetic properties from the plasmon. Our findings are fully corroborated by theoretical modeling and constitute a novel magnetic method for chemo- and biosensing, which (upon adequate PNP functionalization) is intrinsically insensitive to the organic background and thus offers a significant advantage over conventional spectroscopy techniques.
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Affiliation(s)
- Dzmitry Melnikau
- CIC NanoGUNE, Avenida Tolosa 76, 20018 Donostia-San Sebastián, Spain
- National University of Ireland Galway, University Road, Galway, Ireland
| | | | | | - Marek Grzelczak
- CIC biomaGUNE, Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
| | - Luis M. Liz-Marzán
- CIC biomaGUNE, Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
- Biomedical Research Networking Center in
Bioengineering Biomaterials and Nanomedicine, Ciber-BBN, Paseo de
Miramón 182, 20014 Donostia-San Sebastián, Spain
| | - Yury P. Rakovich
- Centro de Física de Materiales
(MPC, CSIC-UPV/EHU) Paseo
Manuel de Lardizabal 5, Donostia-San Sebastián, 20018, Spain
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, Donostia-San
Sebastián, 20018, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
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42
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Abstract
Two-dimensional nanocomposites with magnetic and optical properties were investigated for novel magneto-optical (MO) applications.
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Affiliation(s)
- Jaewook Lee
- Department of Cogno-Mechanical Engineering
- Pusan National University
- Busan 609-735
- Republic of Korea
- Research Institute of Green Science and Technology
| | - Jaebeom Lee
- Department of Cogno-Mechanical Engineering
- Pusan National University
- Busan 609-735
- Republic of Korea
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43
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de Sousa N, Froufe-Pérez LS, Sáenz JJ, García-Martín A. Magneto-Optical Activity in High Index Dielectric Nanoantennas. Sci Rep 2016; 6:30803. [PMID: 27488903 PMCID: PMC4973275 DOI: 10.1038/srep30803] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 07/07/2016] [Indexed: 11/30/2022] Open
Abstract
The magneto-optical activity, namely the polarization conversion capabilities of high-index, non-absorbing, core-shell dielectric nanospheres is theoretically analyzed. We show that, in analogy with their plasmonic counterparts, the polarization conversion in resonant dielectric particles is linked to the amount of electromagnetic field probing the magneto-optical material in the system. However, in strong contrast with plasmon nanoparticles, due to the peculiar distribution of the internal fields in resonant dielectric spheres, the magneto-optical response is fully governed by the magnetic (dipolar and quadrupolar) resonances with little effect of the electric ones.
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Affiliation(s)
- N de Sousa
- Departamento de Física de la Materia Condensada, Condensed Matter Physics Center (IFIMAC) and Instituto "Nicolás Cabrera", Universidad Autónoma de Madrid, 28049, Madrid, Spain.,Donostia International Physics Center (DIPC), P. Manuel de Lardizabal 4, Donostia-San Sebastián 20018, Spain
| | - L S Froufe-Pérez
- Department of Physics, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland
| | - J J Sáenz
- Donostia International Physics Center (DIPC), P. Manuel de Lardizabal 4, Donostia-San Sebastián 20018, Spain.,IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
| | - A García-Martín
- IMM - Instituto de Microelectrónica de Madrid (CNM-CSIC), Isaac Newton 8, PTM, Tres Cantos, E-28760 Madrid, Spain
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44
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Phan QH, Lo YL, Huang CL. Surface plasmon resonance prism coupler for enhanced circular dichroism sensing. OPTICS EXPRESS 2016; 24:12812-12824. [PMID: 27410300 DOI: 10.1364/oe.24.012812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A novel method for enhanced circular dichroism (CD) detection is proposed based on a surface plasmon resonance (SPR) prism coupler and a polarization scanning ellipsometry technique. An analytical model is derived to extract the CD and degree of polarization (DOP) properties of optical samples with and without scattering effects, respectively. The validity of the analytical model is confirmed by means of numerical simulations. The simulation results show that the proposed detection method has a sensitivity of 10-5~10-6 RIU (refractive index unit) for refractive indices in the range of 1.32~1.36 and 1.3100~1.3118. The practical feasibility of the proposed method is demonstrated by the experimental results for the sensitivity of the CD with the chlorophyllin samples with/without scattering effect. It is shown that for both types of sample, the extracted CD value increases linearly with the chlorophyll concentration over the considered range. In general, the results obtained in this study show that the measured CD response is highly sensitive to the polarization scanning angle. Consequently, the potential of polarization scanning ellipsometry for high-resolution CD detection is confirmed.
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45
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Yao H, Shiratsu T. Individual and collective modes of surface magnetoplasmon in thiolate-protected silver nanoparticles studied by MCD spectroscopy. NANOSCALE 2016; 8:11264-11274. [PMID: 27188783 DOI: 10.1039/c6nr00631k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Large magneto-optical (MO) responses at the energy of localized surface plasmon resonance (LSPR), namely, surface magnetoplasmons, are demonstrated for the first time in thiolate-protected silver nanoparticles with magnetic circular dichroism (MCD) spectroscopy. The samples examined are decanethiol (DT)-, azobenzenethiol (ABT)-, and ABT/DT mixed-monolayer-protected Ag nanoparticles. ABT-protected Ag nanoparticles are somewhat aggregated and thus exhibit a broad, collective mode of plasmonic absorption, whereas other samples with highly-dispersed nanoparticles show an individual mode of LSPR absorption. In all Ag nanoparticles, a derivative-like MCD signal is observed under an applied magnetic field of 1.6 T, which can be explained in terms of two circular modes of magnetoplasmon caused by the increase (or decrease) in the Lorentz force imparted on the free electrons that oscillate in the left (or right) circular orbits in the nanosphere. For the Ag nanoparticles exhibiting an individual LSPR mode, in particular, simultaneous deconvolution analysis of UV-vis absorption and MCD spectra reveal that (i) the amplitude of the magnetoplasmonic component with lower frequency (ω-), resulting from the reduction in the confinement strength of collective electrons by the Lorentz force, is stronger than that with a higher frequency (ω+); (ii) the accurate shift or cyclotron frequency between two magnetoplasmonic modes (ωc = ω+-ω-) is size-dependent, and presents a very large value with implications for the apparent enhancement of the local magnetic-field in the Ag nanoparticles. These results strongly suggest that the Ag-thiolate layer or Ag-S bonding on the nanoparticle surface plays a significant role in the MO enhancement.
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Affiliation(s)
- Hiroshi Yao
- Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan.
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Kataja M, Pourjamal S, van Dijken S. Magnetic circular dichroism of non-local surface lattice resonances in magnetic nanoparticle arrays. OPTICS EXPRESS 2016; 24:3562-71. [PMID: 26907013 DOI: 10.1364/oe.24.003562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Subwavelength metallic particles support plasmon resonances that allow extreme confinement of light down to the nanoscale. Irradiation with left- and right hand circularly polarized light results in the excitation of circular plasmon modes with opposite helicity. The Lorenz force lifts the degeneracy of the two modes in magnetic nanoparticles. Consequently, the confinement and frequency of localized surface plasmon resonances can be tuned by an external magnetic field. In this paper, we experimentally demonstrate this effect for nickel nanoparticles using magnetic circular dichroism (MCD). Besides, we show that non-local surface lattice resonances in periodic arrays of the same nanoparticles significantly enhance the MCD signal. A numerical model based on the modified long wavelength approximation is used to reproduce the main features in the experimental spectra and provide design rules for large MCD effects in sensing applications.
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47
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Kataja M, Pourjamal S, Maccaferri N, Vavassori P, Hakala TK, Huttunen MJ, Törmä P, van Dijken S. Hybrid plasmonic lattices with tunable magneto-optical activity. OPTICS EXPRESS 2016; 24:3652-3662. [PMID: 26907022 DOI: 10.1364/oe.24.003652] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report on the optical and magneto-optical response of hybrid plasmonic lattices that consist of pure nickel and gold nanoparticles in a checkerboard arrangement. Diffractive far-field coupling between the individual emitters of the lattices results in the excitation of two orthogonal surface lattice resonance modes. Local analyses of the radiation fields indicate that both the nickel and gold nanoparticles contribute to these collective resonances and, thereby, to the magneto-optical activity of the hybrid arrays. The strong effect of noble metal nanoparticles on the magneto-optical response of hybrid lattices opens up new avenues for the realization of sensitive and tunable magneto-plasmonic nanostructures.
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48
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Cho BB, Park JH, Jung SJ, Lee J, Lee JH, Hur MG, Justin Raj C, Yu KH. Synthesis and characterization of 68Ga labeled Fe3O4 nanoparticles for positron emission tomography (PET) and magnetic resonance imaging (MRI). J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-4026-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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49
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Tian J, Zhang W, Huang Y, Liu Q, Wang Y, Zhang Z, Zhang D. Infrared-induced variation of the magnetic properties of a magnetoplasmonic film with a 3D sub-micron periodic triangular roof-type antireflection structure. Sci Rep 2015; 5:8025. [PMID: 25620787 PMCID: PMC4306118 DOI: 10.1038/srep08025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 12/31/2014] [Indexed: 12/31/2022] Open
Abstract
A carbon-matrix nickel composite magnetoplasmonic film with a 3D sub-micron periodic triangular roof-type antireflection structure (SPTAS) was fabricated via a simple and promising method that combines chemosynthesis with biomimetic techniques. The Troides helena (Linnaeus) forewing (T_FW) was chosen as the biomimetic template. The carbon-matrix Ni wing fabricated via electroless Ni deposition for 6 h (CNMF_6h) exhibits enhanced infrared absorption. Over a wavelength range (888-2500 nm), the enhancement of the infrared absorption of CNMF_6h is up to 1.85 times compared with the T_FW. Furthermore, infrared excitation induces a photothermal effect that results in variation in the magnetic properties of the carbon-matrix Ni wing. The magnetic properties were also confirmed using atomic force microscopy (AFM) and magnetic force microscopy (MFM). The good correlation between the AFM and MFM images demonstrates that the surface of the SPTAS of CNMF_6h exhibits strong magnetic properties. The infrared induced photothermal effect that results in magnetic variation is promising for use in the design of novel magnetoplasmonic films with potential applications in infrared information recording and heat-assisted magnetic recording.
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Affiliation(s)
- Junlong Tian
- State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Wang Zhang
- State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Yiqiao Huang
- State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Qinglei Liu
- State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Yuhua Wang
- Department of Prosthodontics, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Zhijian Zhang
- Jushi Fiberglass Research Institute, Zhejiang Key Laboratory for Fiberglass Research, Jushi Group Co., Ltd., Zhejiang, 314500, P. R. China
| | - Di Zhang
- State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
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50
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Schimpf AM, Lounis SD, Runnerstrom EL, Milliron DJ, Gamelin DR. Redox Chemistries and Plasmon Energies of Photodoped In2O3 and Sn-Doped In2O3 (ITO) Nanocrystals. J Am Chem Soc 2015; 137:518-24. [DOI: 10.1021/ja5116953] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Alina M. Schimpf
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Sebastien D. Lounis
- The
Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
| | - Evan L. Runnerstrom
- The
Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Delia J. Milliron
- The
Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Daniel R. Gamelin
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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