Hybrid surface waves in two-dimensional Rashba-Dresselhaus materials

TL;DR

This paper investigates how Rashba and Dresselhaus spin-orbit interactions in 2D materials lead to hybrid surface electromagnetic waves, which can be tuned via external coherent pumping.

Contribution

It reveals the formation of hybrid surface waves due to spin-orbit interactions and demonstrates control through external pumping, a novel insight into 2D material electromagnetic properties.

Findings

Hybrid surface waves result from Rashba-Dresselhaus interplay.

External pumping allows tuning of wave characteristics.

Off-diagonal conductivity components enable wave hybridization.

Abstract

We address the electromagnetic properties of two-dimensional electron gas confined by a dielectric environment in the presence of both Rashba and Dresselhaus spin-orbit interactions. It is demonstrated that off-diagonal components of the conductivity tensor resulting from a delicate interplay between Rashba and Dresselhaus couplings lead to the hybridization of transverse electric and transverse magnetic surface electromagnetic modes localized at the interface. We show that the characteristics of these hybrid surface waves can be controlled by additional intense external off-resonant coherent pumping.