Abstract

We propose a Babinet-invertible chiral metasurface for achieving dynamically reversible and strong circular dichroism (CD). The proposed metasurface is composed of a ${\rm VO}_2$–metal hybrid structure, and when ${\rm VO}_2$ transits between the dielectric state and the metallic state, the metasurface unit cell switches between complementary structures that are designed according to Babinet’s principle. This leads to a large and reversible CD tuning range between $\pm0.5$ at 0.97 THz, which is larger than the one found in the literature. We attribute the CD effect to extrinsic chirality of the proposed metasurface. We envision that the Babinet-invertible chiral metasurface proposed here will advance the engineering of active and tunable chiro-optical devices and promote their applications.

© 2021 Optical Society of America

Phase-change metasurface with tunable and switchable circular dichroism

Chuanchuan Ding, Guanghao Rui, Bing Gu, Qiwen Zhan, and Yiping Cui
Opt. Lett. 46(10) 2525-2528 (2021)

Design and simulation of a GST-based metasurface with strong and switchable circular dichroism

Huan Jiang, Kangzhun Peng, Ying Cui, Jiyou Zhong, Hui Zhang, Yongyuan Jiang, and Weiren Zhao
Opt. Lett. 47(7) 1907-1910 (2022)

Gradient-assisted metasurface absorber with dual-band chiral switching and quasi-linearly tunable circular dichroism

Jiafei Chen, Shu Zong, Xiaoshan Liu, Guiqiang Liu, Xuefeng Zhan, and Zhengqi Liu
Opt. Lett. 48(18) 4917-4920 (2023)

Graphene–metal hybrid metamaterials for strong and tunable circular dichroism generation

Zhong Huang, Kan Yao, Guangxu Su, Wei Ma, Lin Li, Yongmin Liu, Peng Zhan, and Zhenlin Wang
Opt. Lett. 43(11) 2636-2639 (2018)

Switchable broadband and wide-angular terahertz asymmetric transmission based on a hybrid metal-VO₂ metasurface

Xiaoxiang Dong, Xiaoqing Luo, Yixuan Zhou, Yuanfu Lu, Fangrong Hu, Xinlong Xu, and Guangyuan Li
Opt. Express 28(21) 30675-30685 (2020)