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A Tunable Graphene 0–90° Polarization Rotator Achieved by Sine Equation Voltage Adjustment
Polarization Manipulation has been widely used and plays a key role in wave propagation and information processing. Here, we introduce a polarization rotator in the terahertz range with a polarization conversion ratio up to 99.98% at 4.51 terahertz. It has a single graphene layer on top of the struc...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6630782/ https://www.ncbi.nlm.nih.gov/pubmed/31163676 http://dx.doi.org/10.3390/nano9060849 |
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author | Dai, Jinsong Wei, Zhongchao Zhao, Lin Lin, Qiyuan Lou, Yuyao |
author_facet | Dai, Jinsong Wei, Zhongchao Zhao, Lin Lin, Qiyuan Lou, Yuyao |
author_sort | Dai, Jinsong |
collection | PubMed |
description | Polarization Manipulation has been widely used and plays a key role in wave propagation and information processing. Here, we introduce a polarization rotator in the terahertz range with a polarization conversion ratio up to 99.98% at 4.51 terahertz. It has a single graphene layer on top of the structure patterned by 45° tilted space elliptical rings. By changing the Fermi level from 0.3 ev to 0.7 ev of the graphene, we can turn the reflective light polarization direction between 0° to 90° with nearly unique magnitude. Surface currents theories and graphene characteristics clarify the relationship between polarization angle and Fermi level to be a sine equation adjusted voltage. We firstly put forward an equation to thetunable graphene changing the reflective light polarization angle. It can be widely used in measurement, optic communication, and biology. Besides, with nearly the unique reflective light in different directions, the rotator is designed into a novel radially polarization converter. The latter can be switched from radially polarized light to linearly polarized light, and vice versa, in the terahertz region. |
format | Online Article Text |
id | pubmed-6630782 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-66307822019-08-19 A Tunable Graphene 0–90° Polarization Rotator Achieved by Sine Equation Voltage Adjustment Dai, Jinsong Wei, Zhongchao Zhao, Lin Lin, Qiyuan Lou, Yuyao Nanomaterials (Basel) Article Polarization Manipulation has been widely used and plays a key role in wave propagation and information processing. Here, we introduce a polarization rotator in the terahertz range with a polarization conversion ratio up to 99.98% at 4.51 terahertz. It has a single graphene layer on top of the structure patterned by 45° tilted space elliptical rings. By changing the Fermi level from 0.3 ev to 0.7 ev of the graphene, we can turn the reflective light polarization direction between 0° to 90° with nearly unique magnitude. Surface currents theories and graphene characteristics clarify the relationship between polarization angle and Fermi level to be a sine equation adjusted voltage. We firstly put forward an equation to thetunable graphene changing the reflective light polarization angle. It can be widely used in measurement, optic communication, and biology. Besides, with nearly the unique reflective light in different directions, the rotator is designed into a novel radially polarization converter. The latter can be switched from radially polarized light to linearly polarized light, and vice versa, in the terahertz region. MDPI 2019-06-03 /pmc/articles/PMC6630782/ /pubmed/31163676 http://dx.doi.org/10.3390/nano9060849 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Dai, Jinsong Wei, Zhongchao Zhao, Lin Lin, Qiyuan Lou, Yuyao A Tunable Graphene 0–90° Polarization Rotator Achieved by Sine Equation Voltage Adjustment |
title | A Tunable Graphene 0–90° Polarization Rotator Achieved by Sine Equation Voltage Adjustment |
title_full | A Tunable Graphene 0–90° Polarization Rotator Achieved by Sine Equation Voltage Adjustment |
title_fullStr | A Tunable Graphene 0–90° Polarization Rotator Achieved by Sine Equation Voltage Adjustment |
title_full_unstemmed | A Tunable Graphene 0–90° Polarization Rotator Achieved by Sine Equation Voltage Adjustment |
title_short | A Tunable Graphene 0–90° Polarization Rotator Achieved by Sine Equation Voltage Adjustment |
title_sort | tunable graphene 0–90° polarization rotator achieved by sine equation voltage adjustment |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6630782/ https://www.ncbi.nlm.nih.gov/pubmed/31163676 http://dx.doi.org/10.3390/nano9060849 |
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