Selectivity of dominant surface plasmon polariton modes using thin metal waveguides with grating structures

Abstract

In this study, the conversion of incident light to surface plasmon polaritons (SPPs) was verified for a dielectric-metal-dielectric waveguide with a grating structure. The dominant SPP mode with respect to the propagation distance could be selected by adjusting the thickness of the gold film. The parameters of the grating structure were optimized, and highly efficient light-to-SPP conversion could be realized.

Verification of Plasmon Modes by Separating Electromagnetic Field Components in the Wavenumber Space

“…They can be used to miniaturize integrated circuits beyond the diffraction limit of light and to increase the speed of signal processing. In designing such optical devices, classification of plasmon modes with respect to transverse/longitudinal wave components is useful for property characterization and physical interpretation of light propagation and localization [4].…”