Double-stacked hyperbolic metamaterial waveguide arrays for efficient and broadband terahertz quarter-wave plates

Abstract We demonstrate how it is possible to achieve weak dispersion in the phase delay between two orthogonal polarization states by using double-stacked hyperbolic metamaterial (HMM) waveguide arrays. The weak dispersion in the phase delay originates from the different signs of phase delay from t...

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Autores principales:	Xianmin Ke, Hua Zhu, Junhao Li, Lin Chen, Xun Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/696636c0b2ff4eeeaef9b4f8033db285
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spelling	oai:doaj.org-article:696636c0b2ff4eeeaef9b4f8033db2852021-12-02T12:32:50ZDouble-stacked hyperbolic metamaterial waveguide arrays for efficient and broadband terahertz quarter-wave plates10.1038/s41598-017-00726-32045-2322https://doaj.org/article/696636c0b2ff4eeeaef9b4f8033db2852017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00726-3https://doaj.org/toc/2045-2322Abstract We demonstrate how it is possible to achieve weak dispersion in the phase delay between two orthogonal polarization states by using double-stacked hyperbolic metamaterial (HMM) waveguide arrays. The weak dispersion in the phase delay originates from the different signs of phase delay from the two different HMM waveguide arrays. The condition of dispersion-free phase delay for the transmitted waves has been theoretically derived from the transmission matrix as the propagation characteristic of the HMM waveguide is involved. We further reveal that the designed double-stacked HMM waveguide array can function as an efficient quarter-wave plate that enables the conversion of linearly polarized light to circularly polarized light within a broad frequency band. In addition, the bandwidth over which the degree of linear polarization is nearly unity and over which the angle of linear polarization is kept at approximately 45° is basically consistent with the phase bandwidth. This offers a promising approach for developing a practical polarization converter in the terahertz domain.Xianmin KeHua ZhuJunhao LiLin ChenXun LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xianmin Ke Hua Zhu Junhao Li Lin Chen Xun Li Double-stacked hyperbolic metamaterial waveguide arrays for efficient and broadband terahertz quarter-wave plates
description	Abstract We demonstrate how it is possible to achieve weak dispersion in the phase delay between two orthogonal polarization states by using double-stacked hyperbolic metamaterial (HMM) waveguide arrays. The weak dispersion in the phase delay originates from the different signs of phase delay from the two different HMM waveguide arrays. The condition of dispersion-free phase delay for the transmitted waves has been theoretically derived from the transmission matrix as the propagation characteristic of the HMM waveguide is involved. We further reveal that the designed double-stacked HMM waveguide array can function as an efficient quarter-wave plate that enables the conversion of linearly polarized light to circularly polarized light within a broad frequency band. In addition, the bandwidth over which the degree of linear polarization is nearly unity and over which the angle of linear polarization is kept at approximately 45° is basically consistent with the phase bandwidth. This offers a promising approach for developing a practical polarization converter in the terahertz domain.
format	article
author	Xianmin Ke Hua Zhu Junhao Li Lin Chen Xun Li
author_facet	Xianmin Ke Hua Zhu Junhao Li Lin Chen Xun Li
author_sort	Xianmin Ke
title	Double-stacked hyperbolic metamaterial waveguide arrays for efficient and broadband terahertz quarter-wave plates
title_short	Double-stacked hyperbolic metamaterial waveguide arrays for efficient and broadband terahertz quarter-wave plates
title_full	Double-stacked hyperbolic metamaterial waveguide arrays for efficient and broadband terahertz quarter-wave plates
title_fullStr	Double-stacked hyperbolic metamaterial waveguide arrays for efficient and broadband terahertz quarter-wave plates
title_full_unstemmed	Double-stacked hyperbolic metamaterial waveguide arrays for efficient and broadband terahertz quarter-wave plates
title_sort	double-stacked hyperbolic metamaterial waveguide arrays for efficient and broadband terahertz quarter-wave plates
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/696636c0b2ff4eeeaef9b4f8033db285
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_version_	1718393924470439936

Double-stacked hyperbolic metamaterial waveguide arrays for efficient and broadband terahertz quarter-wave plates

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