Lasing in the Rashba-Dresselhaus spin-orbit coupling regime in a dye-filled liquid crystal optical microcavity

TL;DR

This paper demonstrates lasing and the formation of an optical persistent spin helix in a dye-filled liquid crystal microcavity with Rashba-Dresselhaus spin-orbit coupling, highlighting novel spin-dependent light-matter interactions.

Contribution

It introduces optical gain into a Rashba-Dresselhaus spin-orbit coupled liquid crystal cavity, enabling lasing and spin helix phenomena not previously observed in such systems.

Findings

Lasing occurs in the Rashba-Dresselhaus regime.

An optical persistent spin helix is observed.

Spin-split entangled dispersion is demonstrated.

Abstract

In the presence of Rashba-Dresselhaus coupling, strong spin-orbit interactions in liquid crystal optical cavities result in a distinctive spin-split entangled dispersion. Spin coherence between such modes give rise to an optical persistent-spin-helix. In this letter, we introduce optical gain in such a system, by dispersing a molecular dye in a liquid-crystal microcavity. We demonstrate both lasing in the Rashba-Dresselhaus regime and the emergence of an optical persistent spin helix.