Polarization-sensitive optical absorption modulation driven by toroidal-dipole resonance in asymmetric dielectric tetramer metasurface

Wu Fei; Lu Chen; Wei Qiu; Liangkun Dai; Xiaoyun Jiang; Yuwei Fang; Youlong Yu; Qiwen Zhan; Jigang Hu

doi:10.1117/12.2686633

28 November 2023 Polarization-sensitive optical absorption modulation driven by toroidal-dipole resonance in asymmetric dielectric tetramer metasurface

Wu Fei, Lu Chen, Wei Qiu, Liangkun Dai, Xiaoyun Jiang, Yuwei Fang, Youlong Yu, Qiwen Zhan, Jigang Hu

Author Affiliations +

Proceedings Volume 12773, Nanophotonics and Micro/Nano Optics IX; 1277308 (2023) https://doi.org/10.1117/12.2686633
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Here we propose a metasurface consisting of asymmetric dielectric tetramer arrays, which can realize a polarization-sensitive light modulation through toroidal dipole resonance (TDR) in the near-infrared (NIR) region. We found, by breaking the C_4v symmetry of the tetramer arrays, two narrow-band TDRs can be created with the linewidth around 1.5 nm. Multipolar decomposition of scattering power and electromagnetic field distribution calculations confirm the excitation of TDRs. Our simulation results show that 100% modulation depth in light absorption and selective field confinement can be achieved by changing the polarization orientation of the incident light. Our findings will prompt versatile applications in optical switching, storage, polarization detection, and light emitting devices.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Wu Fei, Lu Chen, Wei Qiu, Liangkun Dai, Xiaoyun Jiang, Yuwei Fang, Youlong Yu, Qiwen Zhan, and Jigang Hu "Polarization-sensitive optical absorption modulation driven by toroidal-dipole resonance in asymmetric dielectric tetramer metasurface", Proc. SPIE 12773, Nanophotonics and Micro/Nano Optics IX, 1277308 (28 November 2023); https://doi.org/10.1117/12.2686633

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