Echo width of plasma coated topological insulator cylinder

Abstract

In the present formulation, we used a theoretical approach to observe the behavior of electromagnetic wave scattering from a time reversal symmetry protected/broken topological insulator cylinder of infinite length, when coated with isotropic plasma layer. By using constitutive relations of topological insulator in Maxwell's equations, electromagnetic scattered and transmitted field equations were refined and expanded in terms of cylindrical wave vector functions. After applying boundary conditions at both interfaces, scattering coefficients were obtained. Scattering behavior was observed by varying isotopic plasma parameters, i.e., plasma density, collisional frequency and core radius. After analyzing the computational results, it was noticed that the scattering behavior of time reversal symmetry protected and symmetry broken topological insulator can be tuned by varying the plasma parameters.