Abstract
In this paper, a novel structure based on nanodisk and nanoring resonators in a Metal-Insulator-Metal (MIM) plasmonic waveguide for triple-channel wavelength demultiplexer (WDM) is proposed. WDM structure consists of a bus waveguide which has been perpendicularly coupled with several nanodisks and nanorings and three drop waveguides. The proposed structure can be adjusted by appropriate choose of refractive index and geometrical parameters. The simulation results present that the transmission spectrum efficiency in the proposed structure increases up to about 80%. The proposed structure can be used in the ultra-compact demultiplexer devices, nanosensors and optical integrated circuits. In this paper, the used numerical method is two dimensional Finite-Difference Time-Domain (FDTD) approach.
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