Modelling and Simulation study for varying Refractive index of a cavity in a Dielectric Whispering Gallery Mode Resonator in THz regime

The response of varying refractive indices of circular cavity fabricated inside a Whispering Gallery Mode Resonator (WGMR) is modelled and studied using Finite element method. With a view to examine as well as characterize the change caused in the transmittance by the cavity and its corresponding refractive indices, we present simulation results of a rectangular cross-section ring resonator which can be optimized with respect to specific molecules, gases or substances to show a deviant response for various applications.