A Numerical Analysis of a Planar Inverse Nano-Resonant Structure

The research into periodic resonant electromagnetic structures based on metal and dielectric components has received major attention in recent years, with new perspectives for the practical use of such structures appearing through the current advancement in metamaterials. Generally, metamaterials science examines the specific responses of structures comprising partial resonant elements tunable at different frequencies. The resulting spectral response of the whole structure exhibits multiple peaks that correspond to different tuning settings of the resonators. Adjusting the geometry of the resonator array, usually of the planar type, influences the eventual spectral response of the structure.
The article presents results obtained from the numerical modelling of planar arrays of passive metal resonators designed for THz frequencies. An important step in the designing of such devices is setting up their specific spectral responses in relation to the dimensions and material properties, which must respect the operating frequencies in the THz band.