Metasurface circular polarizer based on rotational symmetric nanoholes

Haoran Lv; Zhen Mou; Changda Zhou; Shuyun Wang; Xiaobo He; Zhanghua Han; Shuyun Teng

doi:10.1088/1361-6528/abf96a

Metasurface circular polarizer based on rotational symmetric nanoholes

Nanotechnology. 2021 May 10;32(31). doi: 10.1088/1361-6528/abf96a.

Authors

Haoran Lv¹, Zhen Mou¹, Changda Zhou¹, Shuyun Wang¹, Xiaobo He¹, Zhanghua Han¹, Shuyun Teng¹

Affiliation

¹ Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250014, People's Republic of China.

PMID: 33873161
DOI: 10.1088/1361-6528/abf96a

Abstract

A circular polarizer is proposed based on a single layered metasurface. This metasurface circular polarizer is composed of L-shaped nanoholes etched on the silver film. The L-shaped nanoholes are rotational symmetric, and the special symmetric structure determines the polarization selection transmission of the metasurface. The theoretical analysis elaborates the design process of the metasurface circular polarizer. The proposed metasurface circular polarizers have good polarization selective transmittance, and more interestingly, they take on the opposite circular dichroism at different wavebands. The numerical simulations and experiment measurement confirm the circular dichroism of the proposed circular polarizers. The compact design, ultrathin thickness and available performance can expand the applications of the metasurface circular polarizers in the integrated optics.

Keywords: metasurfaces; polarization; polarization-selective devices.