Simple analytical model to use in CAD tools for designing FSS devices: plasmonic transmission through hole arrays in thin films

Modeling of nano-structured plasmonic surfaces in optical range has attracted great attention in recent research for its various optical properties such as filtering and enhanced transmission of light. In this paper, we present a simple nanocircuit model that can be integrated in CAD tools to design filters and perfect absorbers FSS devices that are based on plasmonic transmission through thin films structured by hole arrays. To illustrate the model potential, we applied it for both circular and square hole arrays on a silver thin film. The model is demonstrated for different structure parameters (hole size and film thickness) in optical frequencies. We show that the model results compare to the numerical calculations obtained from COMSOL Multiphysics software with acceptable deviation and that the model achieves good matching with previously reported experimental measurements.

Automated summary

Modeling of nano-structured plasmonic surfaces in optical range has been extensively studied due to their various optical properties. This paper presents a simple nanocircuit model integrated in CAD tools for designing FSS devices based on plasmonic transmission through structured thin films. The model is applied to circular and square hole arrays on a silver thin film, demonstrating good agreement with numerical calculations and experimental measurements.