Comparative study of DR Nanoantenna Array For Optical Frequencies

Abstract

The frequency dependent complex permittivity of plasmonic materials is one of the most decisive parameters in their resonant characteristics. This work shows how the optical responses of gold (Au),and silver(Ag) optical nanoantennas are affected by their size, shape and their frequency dependent optical functions. The optical functions of these metals are described by the Drude-Lorentz model in which both the free electrons contributions and harmonic oscillator (SPRs) acivities are considered. The change of material in the nanostrip and the ground plane results in the change in different parameters like return loss, VSWR , etc.