Terahertz metamaterial narrowband absorber based on  metal split ring

Xiaodi Ji; Hongyi Ge; Yuying Jiang; Xuyang Wu; Zhiyuan Jia; Zhenyu Sun

doi:10.1117/12.3008045

18 December 2023 Terahertz metamaterial narrowband absorber based on metal split ring

Xiaodi Ji, Hongyi Ge, Yuying Jiang, Xuyang Wu, Zhiyuan Jia, Zhenyu Sun

Proceedings Volume 12963, AOPC 2023: Optical Sensing, Imaging, and Display Technology and Applications; and Biomedical Optics; 129631O (2023) https://doi.org/10.1117/12.3008045
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

Multi-band terahertz metamaterial absorbers offer new perspectives to achieve perfect absorption and multipoint information matching, which enable an ever-growing number of applications. In this study, a dual-band terahertz metamaterial absorber based on the metal split ring is designed. The absorber has perfect absorption peaks at 1.15 THz and 2.47 THz, and the absorption rate is more than 99%. The absorber produces a harp peak with a bandwidth of 0.008 at 2.47 THz, which has an extremely high quality factor of 308. The distribution of the electric field and surface current at two resonance points is analyzed using the finite element integration method. Through full wave simulation calculation, the maximum sensitivity of the analyte refractive index of the absorber is 400 GHz/RIU, and the maximum sensitivity of the thickness is 35 GHz/μm. The results show that the absorber can achieve highly sensitive detection of trace substances.

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

Citation Download Citation

Xiaodi Ji, Hongyi Ge, Yuying Jiang, Xuyang Wu, Zhiyuan Jia, and Zhenyu Sun "Terahertz metamaterial narrowband absorber based on metal split ring", Proc. SPIE 12963, AOPC 2023: Optical Sensing, Imaging, and Display Technology and Applications; and Biomedical Optics, 129631O (18 December 2023); https://doi.org/10.1117/12.3008045

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KEYWORDS

Absorption

Metals

Refractive index

Terahertz radiation

Terahertz metamaterials

Electric fields

Electromagnetic radiation

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