All-dielectric terahertz metasurfaces with dual-functional polarization manipulation for orthogonal polarization states

Zhen Yue; Jitao Li; Jie Li; Chenglong Zheng; Jingyu Liu; Die Zou; Hang Xu; Fan Yang; Hui Li; Liang Wu; Yating Zhang; Yan Zhang; Jianquan Yao

doi:10.1039/D2NR06550A

All-dielectric terahertz metasurfaces with dual-functional polarization manipulation for orthogonal polarization states†

Zhen Yue,

^a Jitao Li,

^a Jie Li,

^b Chenglong Zheng,

^a Jingyu Liu,^c Die Zou,^a Hang Xu,^a Fan Yang,^a Hui Li,

^a Liang Wu,^a Yating Zhang,

*^a Yan Zhang

*^c and Jianquan Yao*^a

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* Corresponding authors

^a Key Laboratory of Opto-Electronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin, China
E-mail: yating@tju.edu.cn, jqyao@tju.edu.cn

^b Information Materials and Device Applications Key Laboratory of Sichuan Provincial, Universities Chengdu University of Information Technology, Chengdu 610225, China

^c Beijing Key Laboratory for Metamaterials and Devices, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, and Beijing Advanced Innovation Center for Imaging Technology, Department of Physics, Capital Normal University, Beijing 100048, China
E-mail: yzhang@cnu.edu.cn

Abstract

All-dielectric metasurfaces have led to a surge of activities in the field of polarization converters due to their extremely significant potential in the manipulation of terahertz waves. Herein, a versatile all-dielectric metasurface platform that can realize dual-functional polarization manipulation for the orthogonal states of polarization in the terahertz frequency range is proposed. Furthermore, such metasurface platform exhibits the properties of a full-waveplate for one circularly polarized light, and a quarter-waveplate for the orthogonal circularly polarized light. For experimental demonstrations of strategy verification, several representative metasurfaces consisting of subwavelength-scaled all-silicon elliptical cylinders were designed, fabricated, and characterized to demonstrate the capability of dual-functional polarization manipulation, including bifunctional waveplate, near-field imaging, and focusing. The metasurface platform demonstrated here may provide an alternative perspective for the development of compact, versatile polarization terahertz devices, and the design concept can be extended to other frequency ranges as well.

Nanoscale

All-dielectric terahertz metasurfaces with dual-functional polarization manipulation for orthogonal polarization states†

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All-dielectric terahertz metasurfaces with dual-functional polarization manipulation for orthogonal polarization states

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