Electrically tunable Berry curvature and strong light-matter coupling in birefringent perovskite microcavities at room temperature

TL;DR

This paper demonstrates electrically tunable Berry curvature and strong light-matter coupling in birefringent perovskite microcavities at room temperature, advancing spinoptronics by integrating electrical control with quantum geometrical effects.

Contribution

It introduces a novel hybrid photonic structure with a 2D perovskite in a microcavity, enabling electrical tuning of Berry curvature and exciton-polariton resonances at room temperature.

Findings

Electrical control over Berry curvature achieved.

Strong light-matter coupling demonstrated at room temperature.

Hybrid structure integrates spinoptronic control with electronics.

Abstract

The field of spinoptronics is underpinned by good control over photonic spin-orbit coupling in devices that possess strong optical nonlinearities. Such devices might hold the key to a new era of optoelectronics where momentum and polarization degrees-of-freedom of light are interwoven and interfaced with electronics. However, manipulating photons through electrical means is a daunting task given their charge neutrality and requires complex electro-optic modulation of their medium. In this work, we present electrically tunable microcavity exciton-polariton resonances in a Rashba-Dresselhaus spin-orbit coupling field at room temperature. We show that a combination of different spin orbit coupling fields and the reduced cavity symmetry leads to tunable formation of Berry curvature, the hallmark of quantum geometrical effects. For this, we have implemented a novel architecture of a hybrid photonic structure with a two-dimensional perovskite layer incorporated into a microcavity filled with nematic liquid crystal. Our work interfaces spinoptronic devices with electronics by combining electrical control over both the strong light-matter coupling conditions and artificial gauge fields.