Figure 6From: Topological insulator metamaterials with tunable negative refractive index in the optical regionPermittivity and permeability. 3D FDTD simulation of (a) the real part of μeff, (b) the imaginary part of μeff, (c) the real part of ϵeff, and (d) the imaginary part of ϵeff for the different phases of the Bi2Se3 dielectric layer, where the light source is p polarization at normal incidence angle.Back to article page