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Sun K, Xia W, Wang C, Suo P, Zou Y, Peng J, Wang W, Lin X, Jin Z, Guo Y, Ma G. Highly intrinsic carrier mobility in tin diselenide crystal accessed with ultrafast terahertz spectroscopy. OPTICS EXPRESS 2024; 32:17657-17666. [PMID: 38858943 DOI: 10.1364/oe.523383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Accepted: 04/17/2024] [Indexed: 06/12/2024]
Abstract
Tin diselenide (SnSe2), a layered transition metal dichalcogenide (TMDC), stands out among other TMDCs for its extraordinary photoactive ability and low thermal conductivity. Consequently, it has stimulated many influential researches on photodetectors, ultrafast pulse shaping, thermoelectric devices, etc. However, the carrier mobility in SnSe2, as determined experimentally, remains limited to tens of cm2V-1s-1. This limitation poses a challenge for achieving high-performance SnSe2-based devices. Theoretical calculations, on the other hand, predict that the carrier mobility in SnSe2 can reach hundreds of cm2V-1s-1, approximately one order of magnitude higher than experimental value. Interestingly, the carrier mobility could be underestimated significantly in long-range transportation measurements due to the presence of defects and boundary scattering effects. To address this discrepancy, we employ optic pump terahertz probe spectroscopy to access the photoinduced dynamical THz photoconductivity of SnSe2. Our findings reveal that the intrinsic carrier mobility in conventional SnSe2 single crystal is remarkably high, reaching 353.2 ± 37.7 cm2V-1s-1, consistent with the theoretical prediction. Additionally, dynamical THz photoconductivity measurements reveal that the SnSe2 crystal containing rich defects efficiently capture photoinduced conduction-band electrons and valence-band holes with time constants of ∼20 and ∼200 ps, respectively. Meanwhile, we observe an impulsively stimulated Raman scattering at 0.60 THz. Our study not only demonstrates ultrafast THz spectroscopy as a reliable method for determining intrinsic carrier mobility and detection of low frequency coherent Raman mode in materials but also provides valuable reference for the future application of high-performance SnSe2-based devices.
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Slavich AS, Ermolaev GA, Tatmyshevskiy MK, Toksumakov AN, Matveeva OG, Grudinin DV, Voronin KV, Mazitov A, Kravtsov KV, Syuy AV, Tsymbarenko DM, Mironov MS, Novikov SM, Kruglov I, Ghazaryan DA, Vyshnevyy AA, Arsenin AV, Volkov VS, Novoselov KS. Exploring van der Waals materials with high anisotropy: geometrical and optical approaches. LIGHT, SCIENCE & APPLICATIONS 2024; 13:68. [PMID: 38453886 PMCID: PMC10920635 DOI: 10.1038/s41377-024-01407-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 01/22/2024] [Accepted: 02/01/2024] [Indexed: 03/09/2024]
Abstract
The emergence of van der Waals (vdW) materials resulted in the discovery of their high optical, mechanical, and electronic anisotropic properties, immediately enabling countless novel phenomena and applications. Such success inspired an intensive search for the highest possible anisotropic properties among vdW materials. Furthermore, the identification of the most promising among the huge family of vdW materials is a challenging quest requiring innovative approaches. Here, we suggest an easy-to-use method for such a survey based on the crystallographic geometrical perspective of vdW materials followed by their optical characterization. Using our approach, we found As2S3 as a highly anisotropic vdW material. It demonstrates high in-plane optical anisotropy that is ~20% larger than for rutile and over two times as large as calcite, high refractive index, and transparency in the visible range, overcoming the century-long record set by rutile. Given these benefits, As2S3 opens a pathway towards next-generation nanophotonics as demonstrated by an ultrathin true zero-order quarter-wave plate that combines classical and the Fabry-Pérot optical phase accumulations. Hence, our approach provides an effective and easy-to-use method to find vdW materials with the utmost anisotropic properties.
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Affiliation(s)
- Aleksandr S Slavich
- Moscow Center for Advanced Studies, Kulakova str. 20, Moscow, 123592, Russia
| | - Georgy A Ermolaev
- Emerging Technologies Research Center, XPANCEO, Internet City, Emmay Tower, Dubai, United Arab Emirates
| | | | - Adilet N Toksumakov
- Moscow Center for Advanced Studies, Kulakova str. 20, Moscow, 123592, Russia
| | - Olga G Matveeva
- Moscow Center for Advanced Studies, Kulakova str. 20, Moscow, 123592, Russia
| | - Dmitriy V Grudinin
- Emerging Technologies Research Center, XPANCEO, Internet City, Emmay Tower, Dubai, United Arab Emirates
| | - Kirill V Voronin
- Donostia International Physics Center (DIPC), Donostia/San-Sebastián, 20018, Spain
| | - Arslan Mazitov
- Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | | | - Alexander V Syuy
- Emerging Technologies Research Center, XPANCEO, Internet City, Emmay Tower, Dubai, United Arab Emirates
| | - Dmitry M Tsymbarenko
- Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Mikhail S Mironov
- Emerging Technologies Research Center, XPANCEO, Internet City, Emmay Tower, Dubai, United Arab Emirates
| | - Sergey M Novikov
- Moscow Center for Advanced Studies, Kulakova str. 20, Moscow, 123592, Russia
| | - Ivan Kruglov
- Emerging Technologies Research Center, XPANCEO, Internet City, Emmay Tower, Dubai, United Arab Emirates
| | - Davit A Ghazaryan
- Moscow Center for Advanced Studies, Kulakova str. 20, Moscow, 123592, Russia
- Laboratory of Advanced Functional Materials, Yerevan State University, Yerevan, 0025, Armenia
| | - Andrey A Vyshnevyy
- Emerging Technologies Research Center, XPANCEO, Internet City, Emmay Tower, Dubai, United Arab Emirates
| | - Aleksey V Arsenin
- Emerging Technologies Research Center, XPANCEO, Internet City, Emmay Tower, Dubai, United Arab Emirates
- Laboratory of Advanced Functional Materials, Yerevan State University, Yerevan, 0025, Armenia
| | - Valentyn S Volkov
- Emerging Technologies Research Center, XPANCEO, Internet City, Emmay Tower, Dubai, United Arab Emirates
- Laboratory of Advanced Functional Materials, Yerevan State University, Yerevan, 0025, Armenia
| | - Kostya S Novoselov
- National Graphene Institute (NGI), University of Manchester, Manchester, M13 9PL, UK.
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 03-09 EA, Singapore.
- Institute for Functional Intelligent Materials, National University of Singapore, 117544, Singapore, Singapore.
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Polyanskiy MN. Refractiveindex.info database of optical constants. Sci Data 2024; 11:94. [PMID: 38238330 PMCID: PMC10796781 DOI: 10.1038/s41597-023-02898-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 12/27/2023] [Indexed: 01/22/2024] Open
Abstract
We introduce the refractiveindex.info database, a comprehensive open-source repository containing optical constants for a wide array of materials, and describe in detail the underlying dataset. This collection, derived from a meticulous compilation of data sourced from peer-reviewed publications, manufacturers' datasheets, and authoritative texts, aims to advance research in optics and photonics. The data is stored using a YAML-based format, ensuring integrity, consistency, and ease of access. Each record is accompanied by detailed metadata, facilitating a comprehensive understanding and efficient utilization of the data. In this descriptor, we outline the data curation protocols and the file format used for data records, and briefly demonstrate how the data can be organized in a user-friendly fashion akin to the books in a traditional library.
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Affiliation(s)
- Mikhail N Polyanskiy
- Brookhaven National Laboratory, Accelerator Test Facility, Upton, NY, 11973, USA.
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Panova DA, Tselikov GI, Ermolaev GA, Syuy AV, Zimbovskii DS, Kapitanova OO, Yakubovsky DI, Mazitov AB, Kruglov IA, Vyshnevyy AA, Arsenin AV, Volkov VS. Broadband optical properties of Ti 3C 2 MXene revisited. OPTICS LETTERS 2024; 49:25-28. [PMID: 38134143 DOI: 10.1364/ol.503636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 10/13/2023] [Indexed: 12/24/2023]
Abstract
The exceptional optical, electrical, and mechanical capabilities of layered transition metal carbides, nitrides, and carbonitrides, called MXenes, revolutionized materials science. Among them, Ti3C2 received the most attention owing to the developed synthesis and processing methods, high conductivity, and pronounced plasmonic response. The latter, however, remains controversial with the open question of whether the peak around 800 nm has plasmonic or interband transition origin. To address this issue, we combine spectroscopic ellipsometry and transmittance results with first-principle computations. Their combination reveals that although Ti3C2 is a metal, its optical response becomes plasmonic (Re ε < 0) above 1415 nm, in contrast to the previous understanding. In addition to fundamental significance, this dual dielectric/plasmonic optical response opens a path for theranostic applications, as we demonstrated on the example of Ti3C2 nanospheres. Thus, our study revisits broadband (300-3300 nm) optical constants of Ti3C2 and broadens its application scope in photonics.
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El-Sayed MA, Tselin AP, Ermolaev GA, Tatmyshevskiy MK, Slavich AS, Yakubovsky DI, Novikov SM, Vyshnevyy AA, Arsenin AV, Volkov VS. Non-Additive Optical Response in Transition Metal Dichalcogenides Heterostructures. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12244436. [PMID: 36558289 PMCID: PMC9787828 DOI: 10.3390/nano12244436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/04/2022] [Accepted: 12/09/2022] [Indexed: 05/27/2023]
Abstract
Van der Waals (vdW) heterostructures pave the way to achieve the desired material properties for a variety of applications. In this way, new scientific and industrial challenges and fundamental questions arise. One of them is whether vdW materials preserve their original optical response when assembled in a heterostructure. Here, we resolve this issue for four exemplary monolayer heterostructures: MoS2/Gr, MoS2/hBN, WS2/Gr, and WS2/hBN. Through joint Raman, ellipsometry, and reflectance spectroscopies, we discovered that heterostructures alter MoS2 and WS2 optical constants. Furthermore, despite the similarity of MoS2 and WS2 monolayers, their behavior in heterostructures is markedly different. While MoS2 has large changes, particularly above 3 eV, WS2 experiences modest changes in optical constants. We also detected a transformation from dark into bright exciton for MoS2/Gr heterostructure. In summary, our findings provide clear evidence that the optical response of heterostructures is not the sum of optical properties of its constituents.
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Affiliation(s)
- Marwa A. El-Sayed
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
- Department of Physics, Faculty of Science, Menoufia University, Shebin El-Koom 32511, Egypt
| | - Andrey P. Tselin
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
- Photonics and Quantum Materials Department, Skolkovo Institute of Science and Technology, 3 Nobel, Moscow 143026, Russia
| | - Georgy A. Ermolaev
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
| | - Mikhail K. Tatmyshevskiy
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
| | - Aleksandr S. Slavich
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
| | - Dmitry I. Yakubovsky
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
| | - Sergey M. Novikov
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
| | - Andrey A. Vyshnevyy
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
| | - Aleksey V. Arsenin
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
| | - Valentyn S. Volkov
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
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