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Dual-Function Metasurface for Tunable Selective Absorption

Metamaterials have become a powerful technique in interdisciplinary research, especially in the field of designing terahertz devices. In this paper, two pairs of different structural units of aluminum–polymer composite metamaterials (APCM) for tunable selectivity are designed. One is designed to ach...

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Autores principales: Zhang, Jingyu, Yan, Hanbing, Yang, Xiaoqing, Lyu, Haohui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9783640/
https://www.ncbi.nlm.nih.gov/pubmed/36557385
http://dx.doi.org/10.3390/mi13122087
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author Zhang, Jingyu
Yan, Hanbing
Yang, Xiaoqing
Lyu, Haohui
author_facet Zhang, Jingyu
Yan, Hanbing
Yang, Xiaoqing
Lyu, Haohui
author_sort Zhang, Jingyu
collection PubMed
description Metamaterials have become a powerful technique in interdisciplinary research, especially in the field of designing terahertz devices. In this paper, two pairs of different structural units of aluminum–polymer composite metamaterials (APCM) for tunable selectivity are designed. One is designed to achieve high-contrast near-field imaging of linear polarized waves, the other is designed to achieve high-contrast near-field imaging of circularly polarized waves, which means the structural units have very large circular dichroisms. After theoretical design and simulation optimization, it can be found that the contrast of near-field imaging can be effectively controlled by using vanadium oxide (VO2) to fill the open gap of the structure. When the conductivity of VO2 is 200 S/m, both the reflection difference under linear polarization excitation and the reflection difference under the excitation of the circularly polarized wave are at the maximum. The former has a modulation depth of 0.8, and the latter has a modulation depth of 0.55. This work shows excellent tunable selective absorption ability, which will promote the application of metamaterials in terahertz absorber, such as biomedical, non-destructive testing, security inspection, wireless communication and so on.
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spelling pubmed-97836402022-12-24 Dual-Function Metasurface for Tunable Selective Absorption Zhang, Jingyu Yan, Hanbing Yang, Xiaoqing Lyu, Haohui Micromachines (Basel) Article Metamaterials have become a powerful technique in interdisciplinary research, especially in the field of designing terahertz devices. In this paper, two pairs of different structural units of aluminum–polymer composite metamaterials (APCM) for tunable selectivity are designed. One is designed to achieve high-contrast near-field imaging of linear polarized waves, the other is designed to achieve high-contrast near-field imaging of circularly polarized waves, which means the structural units have very large circular dichroisms. After theoretical design and simulation optimization, it can be found that the contrast of near-field imaging can be effectively controlled by using vanadium oxide (VO2) to fill the open gap of the structure. When the conductivity of VO2 is 200 S/m, both the reflection difference under linear polarization excitation and the reflection difference under the excitation of the circularly polarized wave are at the maximum. The former has a modulation depth of 0.8, and the latter has a modulation depth of 0.55. This work shows excellent tunable selective absorption ability, which will promote the application of metamaterials in terahertz absorber, such as biomedical, non-destructive testing, security inspection, wireless communication and so on. MDPI 2022-11-26 /pmc/articles/PMC9783640/ /pubmed/36557385 http://dx.doi.org/10.3390/mi13122087 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
Zhang, Jingyu
Yan, Hanbing
Yang, Xiaoqing
Lyu, Haohui
Dual-Function Metasurface for Tunable Selective Absorption
title Dual-Function Metasurface for Tunable Selective Absorption
title_full Dual-Function Metasurface for Tunable Selective Absorption
title_fullStr Dual-Function Metasurface for Tunable Selective Absorption
title_full_unstemmed Dual-Function Metasurface for Tunable Selective Absorption
title_short Dual-Function Metasurface for Tunable Selective Absorption
title_sort dual-function metasurface for tunable selective absorption
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9783640/
https://www.ncbi.nlm.nih.gov/pubmed/36557385
http://dx.doi.org/10.3390/mi13122087
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AT yanhanbing dualfunctionmetasurfacefortunableselectiveabsorption
AT yangxiaoqing dualfunctionmetasurfacefortunableselectiveabsorption
AT lyuhaohui dualfunctionmetasurfacefortunableselectiveabsorption