Surface plasmons at the interface between graphene and kerr-type nonlinear medium

TL;DR

This paper investigates surface plasmons at the interface between graphene and a Kerr-type nonlinear medium, demonstrating enhanced confinement and controllability, with potential applications in nonlinear material sensing.

Contribution

It introduces the effects of Kerr-type nonlinearity on graphene plasmons, showing improved confinement and tunability via Fermi energy, temperature, and relaxation time.

Findings

Confinement of plasmons can be tripled with nonlinear effects.

Dispersion relation and propagation distance are controllable.

Potential for precise nonlinear material sensors.

Abstract

The properties of surface plasmons localized at the interface between graphene and kerr-type nonlinear medium in three dimensions are investigated. Compared with surface plasmons at the surface of metal, with the inevitable nonlinear refractive effect, the confinement of plasmon can be improved to three times than graphene plasmons without nonlinear contribution, but also with almost the same relative propagation length. Moreover, the dispersion relation and propation distance of graphene plasmons can be easily controlled by changing the fermi energy, temperature and relaxation time of graphene. Our results suggest a simple but useful potential application for precise nonlinear material sensor using graphene plasmons.