Using Graphene for Tunable Scattering Manipulation of Dielectric Cylinder

In this paper, graphene has been designed for tunable scattering manipulation of a dielectric cylinder. The goal is changing scattering properties of a dielectric cylinder to ones of another cylinder with desired radius. For this purpose, scattering coefficients of the covered and target cylinders have been achieved and equated. Required surface impedance of the graphene in order to obtain the considered goal in the frequencies of 3 and 4 THz has been derived. By properly tuning the chemical potencial of the graphene, caused by induced voltage, this goal has controllably been achieved. Total scattering widths of the bare, target and covered cylinders are obtained from numerical simulations and analytical calculations.