SLL Reduction in Planar Dielectric Waveguide with Graphene Strips Using Genetic Algorithm

Abstract

In this paper, we use genetic algorithm to reduce the side lobe level of the radiation pattern of the H-polarized dielectric waveguide eigenmodes scattered by a finite periodic system of graphene strips at THz. Every individual graphene strip can have its own value of chemical potential and it can be controlled dynamically. In our optimization procedure, the strip width and period are fixed. Only the values of chemical potential are varied for each frequency point. Rigorous solution of the scattering problem is obtained by the method of singular integral equation. Optimized radiation patterns are presented.