Surface plasmon-polariton pulses in the form of bright and dark solitons

TL;DR

This paper models the generation and propagation of surface plasmon-polariton pulses, demonstrating their formation as bright and dark solitons through linear and nonlinear interactions at dielectric-metal boundaries.

Contribution

It introduces a comprehensive analysis of how incident waves transform into surface plasmon-polaritons and reveals the conditions for soliton formation at different harmonics.

Findings

Surface plasmon-polariton fluxes are formed at both harmonics.

Bright and dark solitons propagate under strong harmonic interaction.

Weak interaction results in fluxes at first and second harmonics.

Abstract

We consider the linear and nonlinear models of generation of the surface plasmon-polaritons on the boundary of nonmagnetic dielectric medium and nonmagnetic metal. We have shown how the three-dimensional incident wave is transformed to the fluxes of surface plasmon-polaritons at the first and second harmonics of the TM-mode. These "slow" and "fast" fluxes of the surface plasmon-polaritons are formed at the both harmonics at the weak interaction. We obtain that the pulses of surface plasmon-polaritons propagate as the bright and dark solitons at the strong interaction of the first and second harmonics.