Design and Analysis of a Novel Triangular Nano-Plasmonic Coupler with an Enhanced Coupling Efficiency

A novel design and analysis of a triangular, three-dimensional nano-plasmonic coupler has been presented in this paper. This triangular nano plasmonic coupler couples a Silicon waveguide and metal-insulator-metal (MIM) waveguide. To attain a better coupling efficiency, a novel structure has been proposed in this paper which is capable of coupling electromagnetic (EM) waves in a wide range of wavelengths with the highest efficiency of 95.3%. Optimum dimensions of the triangular coupler have been attained based on systematic adjustments in the structural parameters to maximize the coupling efficiency. The nano-plasmonic coupler can play a major role in efficient coupling of EM wave signal in the integrated photonic circuits involving both MIM and Silicon waveguides.