Broadband bifunctional Luneburg–Fisheye lens based on anisotropic metasurface

Abstract Luneburg lenses and Maxwell fisheye lenses possess distinct properties of focusing, well beyond conventional lenses made of uniform materials. In this paper, a planar broadband bifunctional Luneburg-fisheye lens synthesized by gradient anisotropic metasurface is proposed. The proposed aniso...

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Autores principales:	Jiaqing Chen, Yongjiu Zhao, Lei Xing, Zheng He, Luyang Sun
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b6da51eef7644ed49d2994da81b456ac
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spelling	oai:doaj.org-article:b6da51eef7644ed49d2994da81b456ac2021-12-02T11:42:15ZBroadband bifunctional Luneburg–Fisheye lens based on anisotropic metasurface10.1038/s41598-020-77270-02045-2322https://doaj.org/article/b6da51eef7644ed49d2994da81b456ac2020-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-77270-0https://doaj.org/toc/2045-2322Abstract Luneburg lenses and Maxwell fisheye lenses possess distinct properties of focusing, well beyond conventional lenses made of uniform materials. In this paper, a planar broadband bifunctional Luneburg-fisheye lens synthesized by gradient anisotropic metasurface is proposed. The proposed anisotropic metasurface is formed by non-resonant anisotropic cells, so that it can independently realize the equivalent gradient refractive indexes of Luneburg lens and Maxwell fisheye lens along orthogonal directions in a broad band, respectively. To verify the performance of the bifunctional lens, a prototype associated with a feeding log-periodic dipole antenna has been fabricated. Experimental results show that the proposed lens functions well over a wide frequency range with high efficiency and low profile, which coincides well with theoretical predictions and simulated results. It is expected that the proposed design will facilitate the applications of multifunctional metadevices in microwave and optical ranges.Jiaqing ChenYongjiu ZhaoLei XingZheng HeLuyang SunNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-12 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jiaqing Chen Yongjiu Zhao Lei Xing Zheng He Luyang Sun Broadband bifunctional Luneburg–Fisheye lens based on anisotropic metasurface
description	Abstract Luneburg lenses and Maxwell fisheye lenses possess distinct properties of focusing, well beyond conventional lenses made of uniform materials. In this paper, a planar broadband bifunctional Luneburg-fisheye lens synthesized by gradient anisotropic metasurface is proposed. The proposed anisotropic metasurface is formed by non-resonant anisotropic cells, so that it can independently realize the equivalent gradient refractive indexes of Luneburg lens and Maxwell fisheye lens along orthogonal directions in a broad band, respectively. To verify the performance of the bifunctional lens, a prototype associated with a feeding log-periodic dipole antenna has been fabricated. Experimental results show that the proposed lens functions well over a wide frequency range with high efficiency and low profile, which coincides well with theoretical predictions and simulated results. It is expected that the proposed design will facilitate the applications of multifunctional metadevices in microwave and optical ranges.
format	article
author	Jiaqing Chen Yongjiu Zhao Lei Xing Zheng He Luyang Sun
author_facet	Jiaqing Chen Yongjiu Zhao Lei Xing Zheng He Luyang Sun
author_sort	Jiaqing Chen
title	Broadband bifunctional Luneburg–Fisheye lens based on anisotropic metasurface
title_short	Broadband bifunctional Luneburg–Fisheye lens based on anisotropic metasurface
title_full	Broadband bifunctional Luneburg–Fisheye lens based on anisotropic metasurface
title_fullStr	Broadband bifunctional Luneburg–Fisheye lens based on anisotropic metasurface
title_full_unstemmed	Broadband bifunctional Luneburg–Fisheye lens based on anisotropic metasurface
title_sort	broadband bifunctional luneburg–fisheye lens based on anisotropic metasurface
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/b6da51eef7644ed49d2994da81b456ac
work_keys_str_mv	AT jiaqingchen broadbandbifunctionalluneburgfisheyelensbasedonanisotropicmetasurface AT yongjiuzhao broadbandbifunctionalluneburgfisheyelensbasedonanisotropicmetasurface AT leixing broadbandbifunctionalluneburgfisheyelensbasedonanisotropicmetasurface AT zhenghe broadbandbifunctionalluneburgfisheyelensbasedonanisotropicmetasurface AT luyangsun broadbandbifunctionalluneburgfisheyelensbasedonanisotropicmetasurface
_version_	1718395365473910784

Broadband bifunctional Luneburg–Fisheye lens based on anisotropic metasurface

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