• Tunable plasmonic filter with circular metal–insulator– metal ring resonator containing double narrow gaps

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      https://www.ias.ac.in/article/fulltext/pram/086/05/1091-1097

    • Keywords

       

      Metal–insulator–metal waveguide; surface plasmon; optical filters; ring resonator.

    • Abstract

       

      Tunable filter based on two metal–insulator–metal (MIM) waveguides coupled to each other by a ring resonator with double narrow gaps is designed and numerically investigated by finitedifference time-domain (FDTD) simulations. The propagating modes of surface plasmon polaritons (SPPs) are studied. By introducing narrow gaps in ring resonators, the transmission in differentresonance modes can be effectively adjusted by changing the gap width (g), and the transmitted peak wavelength has a nonlinear relationship with g. Another structure consisting two cascading ring resonators and regular MIM waveguide have also been proposed. The mechanism based on circular ring resonators with narrow gaps may provide a novel method for designing all-opticalintegrated components in optical communication and computing.

    • Author Affiliations

       

      ZHENG GAIGE1 XU LINHUA1 LIU YUZHU1 2

      1. School of Physics and Optoelectronic Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu, China
      2. Paul Scherrer Institute, WSLA-004, Villegen, Switzerland
    • Dates

       
  • Pramana – Journal of Physics | News

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