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Acta Optica Sinica, Volume. 43, Issue 23, 2316002(2023)

High Q-Factor Terahertz All-Dielectric Metamaterial with Bound States in Continuum Based on Split Ring Resonator

Shuai Yue1, Doudou Wang1、*, Tian Ma2, and Jiangkun Tian1
Author Affiliations
  • 1College of Sciences, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi , China
  • 2College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (8)
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    References (33)
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    Figures & Tables(8)
    Schematic diagram of SRR all-dielectric metamaterial structure. (a) Schematic of proposed structure; (b) periodic unit cell; (c) top view (x-y plane) of unit cell

    Fig. 1. Schematic diagram of SRR all-dielectric metamaterial structure. (a) Schematic of proposed structure; (b) periodic unit cell; (c) top view (x-y plane) of unit cell

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    Transmission spectra of SRR metamaterial structure

    Fig. 2. Transmission spectra of SRR metamaterial structure

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    Relationship between Q and asymmetric degree

    Fig. 3. Relationship between Q and asymmetric degree

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    Scattered power of multipole components. (a) Original metamaterial; (b) symmetry-broken metamaterial

    Fig. 4. Scattered power of multipole components. (a) Original metamaterial; (b) symmetry-broken metamaterial

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    Electric and magnetic field distributions and cross sectional distribution of electric field in BIC and QBIC modes. (a) Electric field and (b) magnetic field distributions in BIC mode; (c) electric field and (d) magnetic field distributions in QBIC mode; (e) cross-sectional distribution of electric field in BIC mode; (f) cross-sectional distribution of electric field in QBIC mode

    Fig. 5. Electric and magnetic field distributions and cross sectional distribution of electric field in BIC and QBIC modes. (a) Electric field and (b) magnetic field distributions in BIC mode; (c) electric field and (d) magnetic field distributions in QBIC mode; (e) cross-sectional distribution of electric field in BIC mode; (f) cross-sectional distribution of electric field in QBIC mode

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    Variations of transmission spectra with structural parameters.(a) Height H; (b) period P; (c) outer radius R1; (d) inner radius R2;(e) short arc α; (f) long arc β

    Fig. 6. Variations of transmission spectra with structural parameters.(a) Height H; (b) period P; (c) outer radius R1; (d) inner radius R2;(e) short arc α; (f) long arc β

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    Transmission spectra and sensitivity under different refractive indices.(a) Transmission spectra under different refractive indices of tested object; (b) relationship between resonant frequency and refractive index

    Fig. 7. Transmission spectra and sensitivity under different refractive indices.(a) Transmission spectra under different refractive indices of tested object; (b) relationship between resonant frequency and refractive index

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    • Table 1. Sensitivity and FOM of THz sensors based on different metamaterials

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      Table 1. Sensitivity and FOM of THz sensors based on different metamaterials

      Reference

      Type of

      metamaterial

      Material of

      structured layer

      		Sensitivity /（GHz·RIU-1）FOM
      Ref. ［2］Time domain resonanceAluminum27.3-
      Ref. ［30］Fano resonance-BICSilicon7711.1
      Ref. ［31］Fano resonanceGold1057.51
      Ref. ［32］Perfect absorberAluminum139.2-
      Ref. ［33］Electromagnetically induced transparency （EIT） resonanceGraphene177.759.3
      Ref. ［22］EIT resonanceSilicon23164.7
      This workFano resonance-BICSilicon254.8509.6
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    Shuai Yue, Doudou Wang, Tian Ma, Jiangkun Tian. High Q-Factor Terahertz All-Dielectric Metamaterial with Bound States in Continuum Based on Split Ring Resonator[J]. Acta Optica Sinica, 2023, 43(23): 2316002

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    Paper Information

    Category: Materials

    Received: May. 31, 2023

    Accepted: Sep. 6, 2023

    Published Online: Dec. 8, 2023

    The Author Email: Wang Doudou (wangdoudou@xust.edu.cn)

    DOI:10.3788/AOS231075

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology