Microscopic Theory of Polariton Lasing via Vibronically Assisted Scattering

TL;DR

This paper develops a microscopic model for polariton lasing in crystalline anthracene microcavities, highlighting vibronically assisted scattering as the key mechanism and analyzing the effects of temperature and bimolecular quenching.

Contribution

It introduces a detailed microscopic theory for vibronically assisted polariton lasing, including relaxation processes and realistic material parameters.

Findings

Vibronically assisted scattering drives polariton population build-up.

The model predicts lasing threshold behavior consistent with experiments.

Temperature and bimolecular quenching significantly influence lasing dynamics.

Abstract

Polariton lasing has recently been observed in strongly coupled crystalline anthracene microcavities. A simple model is developed describing the onset of the non-linear threshold based on a master equation including the relevant relaxation processes and employing realistic material parameters. The mechanism governing the build-up of the polariton population - namely bosonic stimulated scattering from the exciton reservoir via a vibronically assisted process - is characterized and its efficiency calculated on the basis of a microscopic theory. The role of polariton-polariton bimolecular quenching is identified and temperature dependent effects are discussed.