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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...

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Detalles Bibliográficos
Autores principales: Dai, Jinsong, Wei, Zhongchao, Zhao, Lin, Lin, Qiyuan, Lou, Yuyao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
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.
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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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