Theoretical Study of Plasmonically Induced Transparency Effect in Arrays of Graphene-Based Double Disk Resonators

Abstract In this paper, we consider coupled disk-shaped resonators separated by a thin dielectric substrate that can be used as frequency-tunable filters or as electromagnetic switches in the terahertz frequency band. The two disks are electromagnetically coupled and resonate with dipole plasmonic modes. By using a Temporal Coupled-Mode Theory based approach, we show how to analytically calculate the frequency response of such structures.The analytical results are in good agreement with those obtained from computational simulations based on the finite element method.

摘要：本文研究由薄介质基板分隔的耦合圆盘形谐振器，该结构可在太赫兹频段中用作频率可调滤波器或电磁开关。两个圆盘间存在电磁耦合，并以偶极等离子模式发生共振。本文采用基于时域耦合模理论（Temporal Coupled-Mode Theory）的分析方法，推导得到此类结构频率响应的解析计算方案。解析结果与基于有限元法的数值仿真结果具有良好的一致性。