Homogeneous Hyperbolic Systems for Terahertz and Far-Infrared Frequencies

Figure 2

The effective refractive index of the three lowest order modes in a Bismuth waveguide. Inset: numerical simulation showing the refraction of a beam within a metallic waveguide (of thickness 𝑑=4.5 μm) at an interface between an isotropic dielectric with 𝜖=55 and monocrystalline Bismuth; 𝜆=61 μm.