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Dichroic Circular Polarizers Based on Plasmonics for Polarization Imaging Applications

Dichroic circular polarizers (DCP) represent an important group of optical filters that transfer only that part of the incident light with the desired polarization state and absorb the remainder. However, DCPs are usually bulky and exhibit significant optical loss. Moreover, the integration of these...

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Detalles Bibliográficos
Autores principales: Zheng, Junyan, He, Xin, Beckett, Paul, Sun, Xinjie, Cai, Zixin, Zhang, Wenyi, Liu, Xu, Hao, Xiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8399006/
https://www.ncbi.nlm.nih.gov/pubmed/34443976
http://dx.doi.org/10.3390/nano11082145
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author Zheng, Junyan
He, Xin
Beckett, Paul
Sun, Xinjie
Cai, Zixin
Zhang, Wenyi
Liu, Xu
Hao, Xiang
author_facet Zheng, Junyan
He, Xin
Beckett, Paul
Sun, Xinjie
Cai, Zixin
Zhang, Wenyi
Liu, Xu
Hao, Xiang
author_sort Zheng, Junyan
collection PubMed
description Dichroic circular polarizers (DCP) represent an important group of optical filters that transfer only that part of the incident light with the desired polarization state and absorb the remainder. However, DCPs are usually bulky and exhibit significant optical loss. Moreover, the integration of these kinds of DCP devices can be difficult and costly as different compositions of chemicals are needed to achieve the desired polarization status. Circular polarizers based on metasurfaces require only thin films in the order of hundreds of nanometers but are limited by their sensitivity to angle of incidence. Furthermore, few existing solutions offer broadband operation in the visible range. By using computational simulations, this paper proposes and analyses a plasmonic DCP structure operating in the visible, from 400 nm to 700 nm which overcomes these drawbacks. The resulting circular dichroism transmission (CDT) is more than 0.9, and the maximum transmission efficiency is greater than 78% at visible wavelengths. These CDT characteristics are largely independent of angle of incidence up to angles of 80 degrees.
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spelling pubmed-83990062021-08-29 Dichroic Circular Polarizers Based on Plasmonics for Polarization Imaging Applications Zheng, Junyan He, Xin Beckett, Paul Sun, Xinjie Cai, Zixin Zhang, Wenyi Liu, Xu Hao, Xiang Nanomaterials (Basel) Article Dichroic circular polarizers (DCP) represent an important group of optical filters that transfer only that part of the incident light with the desired polarization state and absorb the remainder. However, DCPs are usually bulky and exhibit significant optical loss. Moreover, the integration of these kinds of DCP devices can be difficult and costly as different compositions of chemicals are needed to achieve the desired polarization status. Circular polarizers based on metasurfaces require only thin films in the order of hundreds of nanometers but are limited by their sensitivity to angle of incidence. Furthermore, few existing solutions offer broadband operation in the visible range. By using computational simulations, this paper proposes and analyses a plasmonic DCP structure operating in the visible, from 400 nm to 700 nm which overcomes these drawbacks. The resulting circular dichroism transmission (CDT) is more than 0.9, and the maximum transmission efficiency is greater than 78% at visible wavelengths. These CDT characteristics are largely independent of angle of incidence up to angles of 80 degrees. MDPI 2021-08-23 /pmc/articles/PMC8399006/ /pubmed/34443976 http://dx.doi.org/10.3390/nano11082145 Text en © 2021 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
Zheng, Junyan
He, Xin
Beckett, Paul
Sun, Xinjie
Cai, Zixin
Zhang, Wenyi
Liu, Xu
Hao, Xiang
Dichroic Circular Polarizers Based on Plasmonics for Polarization Imaging Applications
title Dichroic Circular Polarizers Based on Plasmonics for Polarization Imaging Applications
title_full Dichroic Circular Polarizers Based on Plasmonics for Polarization Imaging Applications
title_fullStr Dichroic Circular Polarizers Based on Plasmonics for Polarization Imaging Applications
title_full_unstemmed Dichroic Circular Polarizers Based on Plasmonics for Polarization Imaging Applications
title_short Dichroic Circular Polarizers Based on Plasmonics for Polarization Imaging Applications
title_sort dichroic circular polarizers based on plasmonics for polarization imaging applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8399006/
https://www.ncbi.nlm.nih.gov/pubmed/34443976
http://dx.doi.org/10.3390/nano11082145
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