A 2D structure is proposed, made up of nano slits to couple free space mode of any given wave front to a propagating Surface Plasmon Polariton (SPP) mode of Metal Insulator Metal (MIM) waveguide. The structure can be designed to act as either a unidirectional or bidirectional coupler. Designed structures are simulated using an FEM technique and results for circular and plane wave fronts are demonstrated. From the results obtained, it is observed that there is an optimum aperture size for coupling maximum power into the MIM waveguide for the case of a circular wave front.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials