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A Study on Resonance Properties of a Terahertz Asymmetric Split-Loop Resonator Type Metamaterial for High Quality Factor

테라헤르츠 비대칭 분리고리공진기 메타물질의 높은 품질인자를 위한 공진 특성에 관한 연구

  • Park, Dae-Jun (Dept. of convergence science, Sahmyook University) ;
  • Ryu, Han-Cheol (Dept. of convergence science, Sahmyook University)
  • 박대준 (삼육대학교 융합과학과) ;
  • 류한철 (삼육대학교 융합과학과)
  • Received : 2016.09.22
  • Accepted : 2016.11.10
  • Published : 2016.11.30

Abstract

A terahertz asymmetric split-loop resonator (ASLR) was analyzed for use in high-sensitivity sensing applications. Its structural asymmetricity induces an asymmetric Fano resonance which has a high quality factor compared to the symmetric eigen-resonance. The variations of the resonant frequency, transmission coefficient, and quality factor of the ASLR in the eigen and Fano resonances are analyzed as a function of its structural asymmetricity. Also, the surface current densities on the ASLR in both resonances are calculated to analyze the main cause of the variations of its transmission characteristics. The surface current of the ASLR in the eigen resonance shows a dipole resonance, which increases the radiation loss and reduces the quality factor. On the other hand, the surface current of the ASLR in the Fano resonance shows a trapped or quadrupole mode which has a low radiation loss. Therefore, the ASLR operated in the Fano resonance has a high quality factor. Terahertz, high-performance filters and high sensitivity sensors can be developed based on our analysis results of the ASLR having a high quality factor. These high-performance devices based on terahertz metamaterials could increase the adoption of terahertz industrial applications.

Keywords

Terahertz;Metamaterial;Asymmetric split-loop resonator;Fano resonance;Quality factor

Acknowledgement

Supported by : 삼육대학교

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