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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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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. |
format | Online Article Text |
id | pubmed-9783640 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT zhangjingyu dualfunctionmetasurfacefortunableselectiveabsorption AT yanhanbing dualfunctionmetasurfacefortunableselectiveabsorption AT yangxiaoqing dualfunctionmetasurfacefortunableselectiveabsorption AT lyuhaohui dualfunctionmetasurfacefortunableselectiveabsorption |