Simulation of Terahertz Propagation by TE Mode in Metal Dielectric Metal Waveguide

We examine the propagation of terahertz multimode in a metal dielectric metal (MDM) waveguide. In this structure, terahertz radiation propagates through the vacuum region sandwiched by two thin metal plates. At terahertz frequencies metallic plates acts as a perfect electric conductor. Different modes like transverse electric (TE) and transverse magnetic (TM) and multiple modes propagate which depends upon the plate separation and polarisation of incident wave. The TE mode propagation is studied analytically and numerically. Another structure where metallic plates are replaced by semiconductor plates, Surface Plasmon Polariton (SPP) modes are observed propagating through the waveguide. The proposed study is important in developing terahertz devices, such as sensors and modulator.