Multi-band terahertz absorption structure based on nonpolarized metamaterial

Yifan Li; Peihan Xie; Jie Li; Cunguang Lou; Xiuling Liu; Yating Zhang; Jianquan Yao

doi:10.1117/12.2646116

15 December 2022 Multi-band terahertz absorption structure based on nonpolarized metamaterial

Yifan Li, Peihan Xie, Jie Li, Cunguang Lou, Xiuling Liu, Yating Zhang, Jianquan Yao

Proceedings Volume 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022); 1247804 (2022) https://doi.org/10.1117/12.2646116
Event: Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 2022, Xi'an, China

Abstract

Due to the low Terahertz (THz) absorption of micro/nano materials, the responsivity of THz detector is still limited. Metamaterials with properties of enhancing local thermoelectric and affecting dielectric of environment may provide excellent potential in THz detection. In this paper, a multi-band nonpolarized metamaterial structure is designed, which shows effective operating frequency range of multi-band (110 GHz, 220GHz, 2.52 THz and 30 THz) and high absorption of 99%. It is composed of metal, intermediate medium and bottom metal film. The absorption principle of single circular sheet metamaterial is studied. The characteristics of the metamaterial structure are analyzed. The influence of metal films and different structural parameters on the absorption frequency and absorptivity are studied, respectively. It is proved that THz absorption frequency and intensity can be adjusted by changing the structural parameters. Moreover, the absorption characteristics with the increase of incident angle is simulated, which confirms that the structure is insensitive to terahertz wave polarization. This work provides a simple way for THz detection as an enhanced absorption structure.

Citation Download Citation

Yifan Li, Peihan Xie, Jie Li, Cunguang Lou, Xiuling Liu, Yating Zhang, and Jianquan Yao "Multi-band terahertz absorption structure based on nonpolarized metamaterial", Proc. SPIE 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 1247804 (15 December 2022); https://doi.org/10.1117/12.2646116

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KEYWORDS

Absorption

Metals

Terahertz radiation

Metamaterials

Magnetism

Dielectrics

Terahertz detection

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