Infrared and Laser Engineering, Volume. 54, Issue 8, 20250101(2025)

Design of metamaterial filters with ultra-narrow bandwidth and high coupling efficiency

Ying CHEN1, Xiaoxia ZHOU1、*, and Li CAI2
Author Affiliations
  • 1Department of Electronic information and Electrical engineering, Changsha University, Changsha 410022, China
  • 2Laboratory of Science and Technology on Integrated Logistics Support, College of Intelligence Science, National University of Defense Technology, Changsha 410073, China
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    Figures & Tables(6)
    (a) Photon band structure of zero index metamaterials; (b) Transmission coefficient of metamaterials forming resonant cavities
    Illustrative sketch of the filter. (a) The configuration of the filter incorporating resonant cavities; (b) A compsite filter's structure composed of resonant cavities along with ZIM
    (a) The transmission rates of filter with and without ZIM; (b) The distribution of the field in the composite filter; (c) The distribution of the field in a line-defect filter without ZIM
    (a) The equivalent paramters of ZIM near the Dirac like point; (b) The compression effect of ZIM on the filtering bandwidth
    The field distribution in the compsite filter under different ZIM thickness. (a) d2 = 8a; (b) d2 = 30a; (c) The transmission spectra of the compsite filter under different ZIM thickness; (d) Comparison of transmission bandwidth of composite filter and defect state filter under different thickness; (e) Comparison of peak transmittance of composite filter and defect state filter under different thickness
    • Table 1. Parameters for square lattice metamaterials

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      Table 1. Parameters for square lattice metamaterials

      Types of metamaterialsDielectric constant of background/arb. unitsDielectric constant of scatters/arb. unitsLattice constant/μmRadius of scatters/μmRadius of holes/μm
      ZIM1.010.80.850.320.02
      Resonant cavity1.010.80.730.150
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    Ying CHEN, Xiaoxia ZHOU, Li CAI. Design of metamaterial filters with ultra-narrow bandwidth and high coupling efficiency[J]. Infrared and Laser Engineering, 2025, 54(8): 20250101

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    Paper Information

    Category: 光电材料与器件

    Received: Feb. 13, 2025

    Accepted: --

    Published Online: Aug. 29, 2025

    The Author Email: Xiaoxia ZHOU (xiaoxiazhou80@163.com)

    DOI:10.3788/IRLA20250101

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