Absorption Characteristics of a Metasurface composed of Gallium Nitride Coated Spherical Inclusions

Abstract

A comprehensive research has been done to analyze the magnitude of reflection coefficients from a metasurface composed of Gallium-Nitride coated spherical particles under oblique incidence. The material considered for coating is Gallium Nitride. To make the problem simpler, the incident wave is taken to be normal, and a metasurface (MS) is placed in a free-space background. By changing the thick- ness of the coating material on the sphere’s surface, one can adjust the amount of absorption. In this work, the magnitude of the reflection coefficient versus the relative permeability of uncoated and coated magneto-dielectric spheres has been studied. In this study, it has been observed that Gallium- Nitride coated magneto dielectric surface placed in a metasurface with free space as background acts as a good reflector.