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Tunable Terahertz Wavefront Modulation Based on Phase Change Materials Embedded in Metasurface
In the past decades, metasurfaces have shown their extraordinary abilities on manipulating the wavefront of electromagnetic wave. Based on the ability, various kinds of metasurfaces are designed to realize new functional metadevices based on wavefront manipulations, such as anomalous beam steering,...
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/PMC9611032/ https://www.ncbi.nlm.nih.gov/pubmed/36296781 http://dx.doi.org/10.3390/nano12203592 |
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author | Zhang, Ming Dong, Peng Wang, Yu Wang, Baozhu Yang, Lin Wu, Ruihong Hou, Weimin Zhang, Junyao |
author_facet | Zhang, Ming Dong, Peng Wang, Yu Wang, Baozhu Yang, Lin Wu, Ruihong Hou, Weimin Zhang, Junyao |
author_sort | Zhang, Ming |
collection | PubMed |
description | In the past decades, metasurfaces have shown their extraordinary abilities on manipulating the wavefront of electromagnetic wave. Based on the ability, various kinds of metasurfaces are designed to realize new functional metadevices based on wavefront manipulations, such as anomalous beam steering, focus metalens, vortex beams generator, and holographic imaging. However, most of the previously proposed designs based on metasurfaces are fixed once design, which is limited for applications where light modulation needs to be tunable. In this paper, we proposed a design for THz tunable wavefront manipulation achieved by the combination of plasmonic metasurface and phase change materials (PCMs) in THz region. Here, we designed a metal-insulator-metal (MIM) metasurface with the typical C-shape split ring resonator (CSRR), whose polarization conversion efficiency is nearly 90% for circular polarized light (CPL) in the range of 0.95~1.15 THz when PCM is in the amorphous state, but the conversion efficiency turns to less than 10% in the same frequency range when PCM switches into the crystalline state. Then, benefiting from the high polarization conversion contrast of unit cell, we can achieve tunable wavefront manipulation by utilizing the Pancharatnam–Berry (PB) phase between the amorphous and crystalline states. As a proof-of-concept, the reflective tunable anomalous beam deflector and focusing metalens are designed and characterized, and the results further verify their capability for tunable wavefront manipulation in THz range. It is believed that the design in our work may pave the way toward the tunable wavefront manipulation of THz waves and is potential for dynamic tunable THz devices. |
format | Online Article Text |
id | pubmed-9611032 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96110322022-10-28 Tunable Terahertz Wavefront Modulation Based on Phase Change Materials Embedded in Metasurface Zhang, Ming Dong, Peng Wang, Yu Wang, Baozhu Yang, Lin Wu, Ruihong Hou, Weimin Zhang, Junyao Nanomaterials (Basel) Article In the past decades, metasurfaces have shown their extraordinary abilities on manipulating the wavefront of electromagnetic wave. Based on the ability, various kinds of metasurfaces are designed to realize new functional metadevices based on wavefront manipulations, such as anomalous beam steering, focus metalens, vortex beams generator, and holographic imaging. However, most of the previously proposed designs based on metasurfaces are fixed once design, which is limited for applications where light modulation needs to be tunable. In this paper, we proposed a design for THz tunable wavefront manipulation achieved by the combination of plasmonic metasurface and phase change materials (PCMs) in THz region. Here, we designed a metal-insulator-metal (MIM) metasurface with the typical C-shape split ring resonator (CSRR), whose polarization conversion efficiency is nearly 90% for circular polarized light (CPL) in the range of 0.95~1.15 THz when PCM is in the amorphous state, but the conversion efficiency turns to less than 10% in the same frequency range when PCM switches into the crystalline state. Then, benefiting from the high polarization conversion contrast of unit cell, we can achieve tunable wavefront manipulation by utilizing the Pancharatnam–Berry (PB) phase between the amorphous and crystalline states. As a proof-of-concept, the reflective tunable anomalous beam deflector and focusing metalens are designed and characterized, and the results further verify their capability for tunable wavefront manipulation in THz range. It is believed that the design in our work may pave the way toward the tunable wavefront manipulation of THz waves and is potential for dynamic tunable THz devices. MDPI 2022-10-13 /pmc/articles/PMC9611032/ /pubmed/36296781 http://dx.doi.org/10.3390/nano12203592 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, Ming Dong, Peng Wang, Yu Wang, Baozhu Yang, Lin Wu, Ruihong Hou, Weimin Zhang, Junyao Tunable Terahertz Wavefront Modulation Based on Phase Change Materials Embedded in Metasurface |
title | Tunable Terahertz Wavefront Modulation Based on Phase Change Materials Embedded in Metasurface |
title_full | Tunable Terahertz Wavefront Modulation Based on Phase Change Materials Embedded in Metasurface |
title_fullStr | Tunable Terahertz Wavefront Modulation Based on Phase Change Materials Embedded in Metasurface |
title_full_unstemmed | Tunable Terahertz Wavefront Modulation Based on Phase Change Materials Embedded in Metasurface |
title_short | Tunable Terahertz Wavefront Modulation Based on Phase Change Materials Embedded in Metasurface |
title_sort | tunable terahertz wavefront modulation based on phase change materials embedded in metasurface |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9611032/ https://www.ncbi.nlm.nih.gov/pubmed/36296781 http://dx.doi.org/10.3390/nano12203592 |
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