Design and simulation of metal-insulator-metal waveguide for filtering and sensor applications

Abstract
Plasmons in nanometer structures are caused by the interaction between electromagnetic waves and electrons on the metal surface. In this article, a comprehensive and detailed investigation of the effect of effective parameters on the performance of structured MIM waveguides (metal-insulator-metal) has been carried out. These structures are widely used in sensor applications based on refractive index changes or filters. This paper examines the impacts of altering factors like waveguide size, metal type, and insulation while also proposing novel structures with circular and square resonators,Then we simulated the structure of the MIM waveguide connected to the cavity of the T-shaped resonator for different values for the length L of the cavity, It is possible that this issue has a good use in filters and systems with high bandwidth to separate channels  . Also,the properties of surface plasmon polaritons emission were investigated in the case where a resonator is vertically connected to it. The transmission diagram had compared to the MIM waveguide without resonator.