Modal characterization of the plasmonic slot waveguide using comsol multiphysics / Mohd Khairul Hafizan Abdul Hady

The modal characterization of the plasmonic slot waveguide is an investigation on the effects of slot gap in the electromagnetic wave's propagation in plasmonic slot waveguide. The structure of plasmonic slot waveguide is asymmetric. The simulation is done using COMSOL Multiphysics software. The simulation done is the 2D Perpendicular hybrid-mode wave application mode. The refractive index of silver taken is 0.54 and the absorption coefficient is 10.8 at the wavelength of 1.55µm. The width of gap between silver is taken for several value of 25, 50, 75 and 100nm. The wavelength is varies from 1.53 to 1.61 µm. Then, the confinement factor is compared for the different wavelength and the different width of gap. Overall result shows that the confinement factor increased with increasing wavelength. The modal effective index is also found to be increase with increasing wavelength.