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Broadband Spin-Selective Wavefront Manipulations Based on Pancharatnam–Berry Coding Metasurfaces

[Image: see text] Spin-selective reflection metadevices are usually realized by using chiral metamirrors that can reflect one state of circularly polarized (CP) waves and restrain the other one. However, most of the chiral metamirrors only exhibit chirality in a narrow band, which may impede their p...

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Autores principales: Gou, Yue, Ma, Hui Feng, Wu, Liang Wei, Wang, Zheng Xing, Xu, Peng, Cui, Tie Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8582030/
https://www.ncbi.nlm.nih.gov/pubmed/34778673
http://dx.doi.org/10.1021/acsomega.1c04733
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author Gou, Yue
Ma, Hui Feng
Wu, Liang Wei
Wang, Zheng Xing
Xu, Peng
Cui, Tie Jun
author_facet Gou, Yue
Ma, Hui Feng
Wu, Liang Wei
Wang, Zheng Xing
Xu, Peng
Cui, Tie Jun
author_sort Gou, Yue
collection PubMed
description [Image: see text] Spin-selective reflection metadevices are usually realized by using chiral metamirrors that can reflect one state of circularly polarized (CP) waves and restrain the other one. However, most of the chiral metamirrors only exhibit chirality in a narrow band, which may impede their potential applications. Here, we propose a Pancharatnam–Berry (PB) coding metasurface composed of the spin-decoupled elements to realize broadband spin-selective reflections with arbitrary wavefront manipulations. The spin-selective anomalous reflection is designed and measured to validate the performance of the proposed PB coding metasurface. Both simulation and experiment results show that the designated CP wave can be efficiently reflected without reversing the spin state, while at the same time, its orthogonally polarized wave is suppressed by random diffusion, in a broad band from 16 to 24 GHz. The results also reveal that the proposed PB coding metasurface has the chiral-like characteristics, even though it is composed of nonchiral meta-elements.
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spelling pubmed-85820302021-11-12 Broadband Spin-Selective Wavefront Manipulations Based on Pancharatnam–Berry Coding Metasurfaces Gou, Yue Ma, Hui Feng Wu, Liang Wei Wang, Zheng Xing Xu, Peng Cui, Tie Jun ACS Omega [Image: see text] Spin-selective reflection metadevices are usually realized by using chiral metamirrors that can reflect one state of circularly polarized (CP) waves and restrain the other one. However, most of the chiral metamirrors only exhibit chirality in a narrow band, which may impede their potential applications. Here, we propose a Pancharatnam–Berry (PB) coding metasurface composed of the spin-decoupled elements to realize broadband spin-selective reflections with arbitrary wavefront manipulations. The spin-selective anomalous reflection is designed and measured to validate the performance of the proposed PB coding metasurface. Both simulation and experiment results show that the designated CP wave can be efficiently reflected without reversing the spin state, while at the same time, its orthogonally polarized wave is suppressed by random diffusion, in a broad band from 16 to 24 GHz. The results also reveal that the proposed PB coding metasurface has the chiral-like characteristics, even though it is composed of nonchiral meta-elements. American Chemical Society 2021-10-29 /pmc/articles/PMC8582030/ /pubmed/34778673 http://dx.doi.org/10.1021/acsomega.1c04733 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Gou, Yue
Ma, Hui Feng
Wu, Liang Wei
Wang, Zheng Xing
Xu, Peng
Cui, Tie Jun
Broadband Spin-Selective Wavefront Manipulations Based on Pancharatnam–Berry Coding Metasurfaces
title Broadband Spin-Selective Wavefront Manipulations Based on Pancharatnam–Berry Coding Metasurfaces
title_full Broadband Spin-Selective Wavefront Manipulations Based on Pancharatnam–Berry Coding Metasurfaces
title_fullStr Broadband Spin-Selective Wavefront Manipulations Based on Pancharatnam–Berry Coding Metasurfaces
title_full_unstemmed Broadband Spin-Selective Wavefront Manipulations Based on Pancharatnam–Berry Coding Metasurfaces
title_short Broadband Spin-Selective Wavefront Manipulations Based on Pancharatnam–Berry Coding Metasurfaces
title_sort broadband spin-selective wavefront manipulations based on pancharatnam–berry coding metasurfaces
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8582030/
https://www.ncbi.nlm.nih.gov/pubmed/34778673
http://dx.doi.org/10.1021/acsomega.1c04733
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