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Optically-Controlled Terahertz Multifunctional Polarization Conversion Metasurface with Reflection and Transmission Modes

In the terahertz band, how integrating multiple functions into a device with a tiny unit structure is a challenge. In this paper, an optically-controlled multifunctional linear polarization conversion metasurface working in the terahertz band is proposed. The reflection and transmission polarization...

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Detalles Bibliográficos
Autores principales: Tian, Ying, Han, Lichang, Yan, Li, Wang, Jiayun, Zhang, Binzhen, Jiao, Zan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9504176/
https://www.ncbi.nlm.nih.gov/pubmed/36144010
http://dx.doi.org/10.3390/mi13091387
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author Tian, Ying
Han, Lichang
Yan, Li
Wang, Jiayun
Zhang, Binzhen
Jiao, Zan
author_facet Tian, Ying
Han, Lichang
Yan, Li
Wang, Jiayun
Zhang, Binzhen
Jiao, Zan
author_sort Tian, Ying
collection PubMed
description In the terahertz band, how integrating multiple functions into a device with a tiny unit structure is a challenge. In this paper, an optically-controlled multifunctional linear polarization conversion metasurface working in the terahertz band is proposed. The reflection and transmission polarization conversion functions can be realized by irradiating the metasurface with pump light with different wavelengths. The metasurface is designed with a multilayer structure, and a photosensitive semiconductor alone is used to control multiple functions, which makes the manipulation of multifunctional devices easy. When the photosensitive semiconductor germanium (Ge) and silicon (Si) are in different states, the metasurface can realize broadband reflection and transmission polarization conversion functions, the corresponding relative bandwidth are 102.4% and 98.9%, respectively, and the work efficiency can be regulated by pump light with different intensity and wavelength. In addition, the working principle of the metasurface is analyzed by eigenmode theory and surface current distributions. The stability of the metasurface to structural parameters and incident angles are discussed.
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spelling pubmed-95041762022-09-24 Optically-Controlled Terahertz Multifunctional Polarization Conversion Metasurface with Reflection and Transmission Modes Tian, Ying Han, Lichang Yan, Li Wang, Jiayun Zhang, Binzhen Jiao, Zan Micromachines (Basel) Article In the terahertz band, how integrating multiple functions into a device with a tiny unit structure is a challenge. In this paper, an optically-controlled multifunctional linear polarization conversion metasurface working in the terahertz band is proposed. The reflection and transmission polarization conversion functions can be realized by irradiating the metasurface with pump light with different wavelengths. The metasurface is designed with a multilayer structure, and a photosensitive semiconductor alone is used to control multiple functions, which makes the manipulation of multifunctional devices easy. When the photosensitive semiconductor germanium (Ge) and silicon (Si) are in different states, the metasurface can realize broadband reflection and transmission polarization conversion functions, the corresponding relative bandwidth are 102.4% and 98.9%, respectively, and the work efficiency can be regulated by pump light with different intensity and wavelength. In addition, the working principle of the metasurface is analyzed by eigenmode theory and surface current distributions. The stability of the metasurface to structural parameters and incident angles are discussed. MDPI 2022-08-25 /pmc/articles/PMC9504176/ /pubmed/36144010 http://dx.doi.org/10.3390/mi13091387 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tian, Ying
Han, Lichang
Yan, Li
Wang, Jiayun
Zhang, Binzhen
Jiao, Zan
Optically-Controlled Terahertz Multifunctional Polarization Conversion Metasurface with Reflection and Transmission Modes
title Optically-Controlled Terahertz Multifunctional Polarization Conversion Metasurface with Reflection and Transmission Modes
title_full Optically-Controlled Terahertz Multifunctional Polarization Conversion Metasurface with Reflection and Transmission Modes
title_fullStr Optically-Controlled Terahertz Multifunctional Polarization Conversion Metasurface with Reflection and Transmission Modes
title_full_unstemmed Optically-Controlled Terahertz Multifunctional Polarization Conversion Metasurface with Reflection and Transmission Modes
title_short Optically-Controlled Terahertz Multifunctional Polarization Conversion Metasurface with Reflection and Transmission Modes
title_sort optically-controlled terahertz multifunctional polarization conversion metasurface with reflection and transmission modes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9504176/
https://www.ncbi.nlm.nih.gov/pubmed/36144010
http://dx.doi.org/10.3390/mi13091387
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