SPP waveguide based on the Goos-Hanchen effect

We propose and realize a single-mode surface plasmon polariton (SPP) waveguide formed by two parallel grooves on the surface of a high-quality silver film. In the waveguide, the SPP wave undergoes the Goos-Hanchen shift of up to 0.77 . lambda(SPP) at each successive reflection, with the electric field of the SPP wave outside the metal, which significantly reduces the metal loss of the guided SPP wave. Using the waveguide, we demonstrate a complex on-chip optical circuit that includes (1) SPP plane wave excitation, (2) SPP plane wave focusing with a parabolic mirror, and (3) coupling of the focused SPP wave to the waveguide. (C) 2021 Optical Society of America

Automated summary

This study proposes and realizes a single-mode surface plasmon polariton (SPP) waveguide formed by two parallel grooves on a high-quality silver film, reducing metal loss and demonstrating a complex on-chip optical circuit involving SPP plane wave excitation, focusing, and coupling.