Research on the infrared filtering performance of metasurfaces based on GST

Ruonan Feng; Jianbo Wang; Wenqi Zhang; Xiaoqi Li; Jiaxu Shen; Cuiping Zhang; Yong Tan

doi:10.1117/12.2688055

6 November 2023 Research on the infrared filtering performance of metasurfaces based on GST

Ruonan Feng, Jianbo Wang, Wenqi Zhang, Xiaoqi Li, Jiaxu Shen, Cuiping Zhang, Yong Tan

Proceedings Volume 12921, Third International Computing Imaging Conference (CITA 2023); 129210V (2023) https://doi.org/10.1117/12.2688055
Event: Third International Computing Imaging Conference (CITA 2023), 2023, Sydney, Australia

Abstract

A filtering switch for the infrared band was designed by combining GST with a metasurfaces. When GST is in the crystalline state, the resonant wavelength corresponding to the narrowband in the transmission spectrum of the metasurfaces is 3.8 μm, with a quality factor Q of 84.4 and a modulation depth MD of 81.8%, achieving narrowband filtering performance for the switch. By using FDTD simulation, the transmittance of the metasurfaces at different degrees of crystallization of GST was calculated, and a continuously tunable narrowband filtering switch in the range of 3.00 μm to 3.80 μm was obtained. Finally, the influence of the structural parameters of the phase change material metasurfaces on its filtering characteristics was investigated through simulation, which facilitated the optimization of the metasurfaces structure, and the filtering switch was optimized to 3.8 μm.

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

Citation Download Citation

Ruonan Feng, Jianbo Wang, Wenqi Zhang, Xiaoqi Li, Jiaxu Shen, Cuiping Zhang, and Yong Tan "Research on the infrared filtering performance of metasurfaces based on GST", Proc. SPIE 12921, Third International Computing Imaging Conference (CITA 2023), 129210V (6 November 2023); https://doi.org/10.1117/12.2688055

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KEYWORDS

Tunable filters

Crystals

Dielectrics

Signal intensity

Switches

Electromagnetic radiation

Modulation

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