Opto-Electronic Engineering, Volume. 52, Issue 2, 240274-1(2025)

All-dielectric terahertz metasurface based on bound states in the continuum and the research of its equivalent parameter

Xingning Jia1... Meng Wang2,*, Yuehan Zhao2, Ruiqi Zhao3 and Guizhen Lu4 |Show fewer author(s)
Author Affiliations
  • 1School of Electronic and Electrical Engineering, Ningxia University, Yinchuan, Ningxia 750021, China
  • 2School of Integrated Circuit Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
  • 3Shandong Key Laboratory of Low-altitude Airspace Surveillance Network Technology, QILU Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), Jinan, Shandong 250000, China
  • 4State Key Laboratory of Media Convergence and Communication, Communication University of China, Beijing 100024, China
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    In this research, an all-dielectric terahertz metasurface based on bound states in the continuum (BIC) is proposed. Each structural unit of the metasurface consists of two rectangle blocks with square cross-sections and a substrate. The substrate material is quartz, and the rectangle block material of the surface is lossless silicon. The symmetry of the metasurface is broken by tchanging the cross-section area of the rectangle block, and the quasi-BIC is excited. The resonance with extremely narrow linewidth is obtained. The transmission spectra with different asymmetric, structural and material parameters are studied using finite element method (FEM) and control variable method. Meanwhile, the Q factor of the proposed metasurface is calculated, which can reach 1.1006×104 and is higher than the Q factors from related listed references. In addition, this study is aimed at the limitations of the relatively limited research on the equivalent parameters of all-dielectric metasurfaces, the S-parameter extraction method is utilized to calculate and analyze the equivalent parameters of the proposed metasurface and the physical properties of the metasurface is studied from this perspective preliminarily.

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    Xingning Jia, Meng Wang, Yuehan Zhao, Ruiqi Zhao, Guizhen Lu. All-dielectric terahertz metasurface based on bound states in the continuum and the research of its equivalent parameter[J]. Opto-Electronic Engineering, 2025, 52(2): 240274-1

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    Paper Information

    Category: Article

    Received: Nov. 25, 2024

    Accepted: Jan. 15, 2025

    Published Online: Apr. 27, 2025

    The Author Email:

    DOI:10.12086/oee.2025.240274

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