Guiding light in different plasmoic nano-slot waveguides for nano-interconnect application

The characteristics of plasmonic nano-slot waveguides, in terms of different metallic materials and geometries, are presented in this paper. We numerically investigate how efficiently light can be guided in straight and bend types of metallic waveguide at nanoscale. For numerical simulation the Drude model incorporated finite difference time domain (FDTD) method is used to handle the dispersive nature of the metals such as gold, silver, copper, aluminum at visible and near infra-red (IR) wavelengths. It is demonstrated that the plasmonic waveguide with nano-slot is an efficient candidate for optical interconnects at the visible and near-IR range of electromagnetic spectrum. The performance of straight, 90deg and Z-bend nano-slot waveguides is discussed by means of transmission and near-field characteristics.