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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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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. |
format | Online Article Text |
id | pubmed-8399006 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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