Chiral polaritons based on achiral Fabry-Perot cavities using apparent circular dichroism

TL;DR

This paper proposes a theoretical method to generate chiral polaritons with high dissymmetry using achiral Fabry-Perot cavities and apparent circular dichroism, opening new avenues for quantum technologies.

Contribution

It introduces a quantum electrodynamical framework for apparent circular dichroism and provides design principles to optimize chiral polariton dissymmetry in achiral cavities.

Findings

Chiral polaritons can be achieved with achiral cavities and ACD.

Design rules for maximizing dissymmetry are identified.

Theoretical model guides experimental realization of chiral polaritons.

Abstract

Polariton states with high levels of chiral dissymmetry offer exciting prospects for quantum information, sensing, and lasing applications. Such dissymmetry must emanate from either the involved optical resonators or the quantum emitters. Here, we theoretically demonstrate how chiral polaritons can be realized by combining (high quality factor) achiral Fabry-Perot cavities with samples exhibiting a phenomenon known as "apparent circular dichroism" (ACD), which results from an interference between linear birefringence and dichroic interactions. By introducing a quantum electrodynamical theory of ACD, we identify the design rules based on which the dissymmetry of chiral polaritons can be optimized.