Electrical switching of a chiral lasing from polariton condensate in a Rashba-Dresselhaus regime

TL;DR

This paper demonstrates electrically tunable chiral lasing from a polariton condensate with Rashba-Dresselhaus spin-orbit coupling in a novel device using birefringent liquid crystals and perovskite crystals, enabling control over polarization states.

Contribution

It introduces a new electrically tunable device that achieves chiral lasing via photonic Rashba-Dresselhaus SOC in a polariton condensate, with in situ energy tuning and polarization control.

Findings

Achieved strong light-matter coupling with CsPbBr3 perovskite in a novel growth method.

Demonstrated in situ tuning of condensate energy using liquid crystal's electric field sensitivity.

Enabled switching of chiral condensate emission with applied voltage.

Abstract

Efficient optical classical and quantum information processing imposes on light novel requirements: chirality with low threshold non-linearities. In this work we demonstrate a chiral lasing from an optical modes due to emerging photonic Rashba-Dresselhaus spin-orbit coupling (SOC). For this purpose we developed a new electrically tunable device based on an optical cavity filled with birefringent liquid crystal (LC) and perovskite crystals. Our novel method for the growth of single crystals of CsPbBr$_3$ inorganic perovskite in polymer templates allows us to reach a strong light-matter coupling regime between perovskite excitons and cavity modes, and induce polariton condensation. The sensitivity of the LC to external electric fields lets us to tune the condensate energy in situ and induce synthetic SOC. This shapes the condensate between a single linearly polarized or two circularly polarized separated in momentum, emitting coherent light. The difference in the condensation thresholds between the two SOC regimes can be used to switch on and off the chiral condensate emission with a voltage.