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Demésy G, Wu T, Brûlé Y, Zolla F, Nicolet A, Lalanne P, Gralak B. Dispersive perfectly matched layers and high-order absorbing boundary conditions for electromagnetic quasinormal modes. J Opt Soc Am A Opt Image Sci Vis 2023; 40:1947-1958. [PMID: 37855551 DOI: 10.1364/josaa.499370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 09/01/2023] [Indexed: 10/20/2023]
Abstract
Resonances, also known as quasinormal modes (QNMs) in the non-Hermitian case, play a ubiquitous role in all domains of physics ruled by wave phenomena, notably in continuum mechanics, acoustics, electrodynamics, and quantum theory. The non-Hermiticity arises from the system losses, whether they are material (Joule losses in electromagnetism) or linked to the openness of the problem (radiation losses). In this paper, we focus on the latter delicate matter when considering bounded computational domains mandatory when using, e.g., finite elements. We address the important question of whether dispersive perfectly matched layer (PML) and high-order absorbing boundary conditions offer advantages in QNM computation and modal expansion of the optical responses compared with nondispersive PMLs.
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Abstract
For the motion control of individual molecules at room temperature, optical tweezers could be one of the best approaches to realize desirable selectivity with high resolution in time and space. Because of physical limitations due to the thermal fluctuation, optical manipulation of small molecules at room temperature is still a challenging subject. The difficulty of the manipulation also emerged from the variation of molecular polarizability depending on the choice of molecules as well as the molecular orientation to the optical field. In this article, we have demonstrated plasmonic optical trapping of small size molecules with less than 1 nm at the gap of a single metal nanodimer immersed in an electrolyte solution. In situ electrochemical surface-enhanced Raman scattering measurements prove that a plasmonic structure under electrochemical potential control realizes not only the selective molecular condensation but also the formation of unique mixed molecular phases which is distinct from those under a thermodynamic equilibrium. Through detailed analyses of optical trapping behavior, we established the methodology of plasmonic optical trapping to create the novel adsorption isotherm under applying an optical force at electrified interfaces.
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Affiliation(s)
- Nobuaki Oyamada
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Hiro Minamimoto
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Kei Murakoshi
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
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Shi H, Zhu X, Zhang S, Wen G, Zheng M, Duan H. Plasmonic metal nanostructures with extremely small features: new effects, fabrication and applications. Nanoscale Adv 2021; 3:4349-4369. [PMID: 36133477 PMCID: PMC9417648 DOI: 10.1039/d1na00237f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/14/2021] [Indexed: 06/14/2023]
Abstract
Surface plasmons in metals promise many fascinating properties and applications in optics, sensing, photonics and nonlinear fields. Plasmonic nanostructures with extremely small features especially demonstrate amazing new effects as the feature sizes scale down to the sub-nanometer scale, such as quantum size effects, quantum tunneling, spill-out of electrons and nonlocal states etc. The unusual physical, optical and photo-electronic properties observed in metallic structures with extreme feature sizes enable their unique applications in electromagnetic field focusing, spectra enhancing, imaging, quantum photonics, etc. In this review, we focus on the new effects, fabrication and applications of plasmonic metal nanostructures with extremely small features. For simplicity and consistency, we will focus our topic on the plasmonic metal nanostructures with feature sizes of sub-nanometers. Subsequently, we discussed four main and typical plasmonic metal nanostructures with extremely small features, including: (1) ultra-sharp plasmonic metal nanotips; (2) ultra-thin plasmonic metal films; (3) ultra-small plasmonic metal particles and (4) ultra-small plasmonic metal nanogaps. Additionally, the corresponding fascinating new effects (quantum nonlinear, non-locality, quantum size effect and quantum tunneling), applications (spectral enhancement, high-order harmonic wave generation, sensing and terahertz wave detection) and reliable fabrication methods will also be discussed. We end the discussion with a brief summary and outlook of the main challenges and possible breakthroughs in the field. We hope our discussion can inspire the broader design, fabrication and application of plasmonic metal nanostructures with extremely small feature sizes in the future.
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Affiliation(s)
- Huimin Shi
- Center for Research on Leading Technology of Special Equipment, School of Mechanical and Electrical Engineering, Guangzhou University Guangzhou 510006 China
| | - Xupeng Zhu
- School of Physics Science and Technology, Lingnan Normal University Zhanjiang 524048 China
| | - Shi Zhang
- College of Mechanical and Vehicle Engineering, Hunan University Changsha 410082 China
| | - Guilin Wen
- Center for Research on Leading Technology of Special Equipment, School of Mechanical and Electrical Engineering, Guangzhou University Guangzhou 510006 China
| | | | - Huigao Duan
- College of Mechanical and Vehicle Engineering, Hunan University Changsha 410082 China
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Lu YW, Li LY, Liu JF. Influence of Surface Roughness on Strong Light-Matter Interaction of a Quantum Emitter-Metallic Nanoparticle System. Sci Rep 2018; 8:7115. [PMID: 29740123 PMCID: PMC5940830 DOI: 10.1038/s41598-018-25584-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 04/24/2018] [Indexed: 11/22/2022] Open
Abstract
We investigate the quantum optical properties of strong light-matter interaction between a quantum emitter and a metallic nanoparticle beyond idealized structures with a smooth surface. Based on the local coupling strength and macroscopic Green’s function, we derived an exact quantum optics approach to obtain the field enhancement and light-emission spectrum of a quantum emitter. Numerical simulations show that the surface roughness has a greater effect on the near-field than on the far-field, and slightly increases the vacuum Rabi splitting on average. Further, we verified that the near-field enhancement is mainly determined by the surface features of hot-spot area.
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Affiliation(s)
- Yu-Wei Lu
- College of Electronic Engineering, South China Agricultural University, Guangzhou, 510642, China.,School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
| | - Ling-Yan Li
- College of Electronic Engineering, South China Agricultural University, Guangzhou, 510642, China
| | - Jing-Feng Liu
- College of Electronic Engineering, South China Agricultural University, Guangzhou, 510642, China.
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Lagos MJ, Trügler A, Amarasinghe V, Feldman LC, Hohenester U, Batson PE. Excitation of long-wavelength surface optical vibrational modes in films, cubes and film/cube composite system using an atom-sized electron beam. Microscopy (Oxf) 2018; 67:i3-i13. [DOI: 10.1093/jmicro/dfx130] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 12/16/2017] [Indexed: 11/13/2022] Open
Affiliation(s)
- Maureen J Lagos
- Department of Physics and Astronomy
- Department of Materials and Science Engineering, Rutgers University, Piscataway, NJ 08854, USA
- Institute for Advanced Materials, Devices, and Nanotechnology, Rutgers University, Piscataway, NJ 08854, USA
| | - Andreas Trügler
- Institute of Physics, University of Graz, Universitätsplatz 5, Graz 8010, Austria
| | - Voshadhi Amarasinghe
- Institute for Advanced Materials, Devices, and Nanotechnology, Rutgers University, Piscataway, NJ 08854, USA
| | - Leonard C Feldman
- Department of Physics and Astronomy
- Department of Materials and Science Engineering, Rutgers University, Piscataway, NJ 08854, USA
- Institute for Advanced Materials, Devices, and Nanotechnology, Rutgers University, Piscataway, NJ 08854, USA
| | - Ulrich Hohenester
- Institute of Physics, University of Graz, Universitätsplatz 5, Graz 8010, Austria
| | - Philip E Batson
- Department of Physics and Astronomy
- Department of Materials and Science Engineering, Rutgers University, Piscataway, NJ 08854, USA
- Institute for Advanced Materials, Devices, and Nanotechnology, Rutgers University, Piscataway, NJ 08854, USA
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Todisco F, Esposito M, Panaro S, De Giorgi M, Dominici L, Ballarini D, Fernández-Domínguez AI, Tasco V, Cuscunà M, Passaseo A, Ciracì C, Gigli G, Sanvitto D. Toward Cavity Quantum Electrodynamics with Hybrid Photon Gap-Plasmon States. ACS Nano 2016; 10:11360-11368. [PMID: 28024373 DOI: 10.1021/acsnano.6b06611] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Combining localized surface plasmons (LSPs) and diffractive surface waves (DSWs) in metallic nanoparticle gratings leads to the emergence of collective hybrid plasmonic-photonic modes known as surface lattice resonances (SLRs). These show reduced losses and therefore a higher Q factor with respect to pure LSPs, at the price of larger volumes. Thus, they can constitute a flexible and efficient platform for light-matter interaction. However, it remains an open question if there is, in terms of the Q/V ratio, a sizable gain with respect to the uncoupled LSPs or DSWs. This is a fundamental point to shed light upon if such modes want to be exploited, for instance, for cavity quantum electrodynamic effects. Here, using aluminum nanoparticle square gratings with unit cells consisting of narrow-gap disk dimers-a geometry featuring a very small modal volume-we demonstrate that an enhancement of the Q/V ratio with respect to the pure LSP and DSW is obtained for SLRs with a well-defined degree of plasmon hybridization. Simultaneously, we report a 5× increase of the Q/V ratio for the gap-coupled LSP with respect to that of the single nanoparticle. These outcomes are experimentally probed against the Rabi splitting, resulting from the coupling between the SLR and a J-aggregated molecular dye, showing an increase of 80% with respect to the DSW-like SLR sustained by the disk LSP of the dimer. The results of this work open the way toward more efficient applications for the exploitation of excitonic nonlinearities in hybrid plasmonic platforms.
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Affiliation(s)
- Francesco Todisco
- CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy
- Dipartimento di Matematica e Fisica "Ennio De Giorgi" Strada Provinciale Lecce-Monteroni, Universitá del Salento , Campus Ecotekne, Lecce 73100, Italy
| | - Marco Esposito
- CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy
- Dipartimento di Matematica e Fisica "Ennio De Giorgi" Strada Provinciale Lecce-Monteroni, Universitá del Salento , Campus Ecotekne, Lecce 73100, Italy
| | - Simone Panaro
- Center for Biomolecular Nanotechnologies@UNILE, Istituto Italiano di Tecnologia , Via Barsanti, Arnesano 73010, Italy
| | - Milena De Giorgi
- CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy
| | - Lorenzo Dominici
- CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy
| | - Dario Ballarini
- CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy
| | - Antonio I Fernández-Domínguez
- Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid Calle Francisco Tomás y Valiente , 7 Madrid E-28049, Spain
| | - Vittorianna Tasco
- CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy
| | - Massimo Cuscunà
- CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy
| | - Adriana Passaseo
- CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy
| | - Cristian Ciracì
- Center for Biomolecular Nanotechnologies@UNILE, Istituto Italiano di Tecnologia , Via Barsanti, Arnesano 73010, Italy
| | - Giuseppe Gigli
- CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy
- Dipartimento di Matematica e Fisica "Ennio De Giorgi" Strada Provinciale Lecce-Monteroni, Universitá del Salento , Campus Ecotekne, Lecce 73100, Italy
| | - Daniele Sanvitto
- CNR NANOTEC Istituto di Nanotecnologia, c/o Campus Ecotekne Via Monteroni Lecce, Lecce 73100, Italy
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