Quantum ring with the Rashba spin-orbit interaction in the regime of strong light-matter coupling

TL;DR

This paper develops a theoretical framework for semiconductor quantum rings with Rashba spin-orbit interaction under high-frequency light, showing how light can control electronic and spin properties for spintronic applications.

Contribution

It introduces a Floquet theory-based model for quantum rings under off-resonant electromagnetic fields, revealing how light modifies key electronic characteristics.

Findings

Dressing field significantly alters spin-orbit coupling.

Effective electron mass and optical response are tunable by light.

Potential for light-controlled spin polarization in spintronics.

Abstract

We developed the theory of electronic properties of semiconductor quantum rings with the Rashba spin-orbit interaction irradiated by an off-resonant high-frequency electromagnetic field (dressing field). Within the Floquet theory of periodically driven quantum systems, it is demonstrated that the dressing field drastically modifies all electronic characteristics of the rings, including spin-orbit coupling, effective electron mass and optical response. Particularly, the present effect paves the way to controlling the spin polarization of electrons with light in prospective ring-shaped spintronic devices.