Suppression of the bottleneck in semiconductor microcavities

TL;DR

This paper investigates how high polariton densities can suppress the bottleneck effect in semiconductor microcavities, highlighting the roles of decay times, quantum well width, and exciton-cavity detuning.

Contribution

It provides a numerical analysis showing conditions that effectively suppress the polariton bottleneck in microcavities, a novel insight for optimizing polariton relaxation.

Findings

Suppression occurs at high polariton densities.

Long decay times favor bottleneck suppression.

Small exciton-cavity detuning aids in suppression.

Abstract

The relaxation kinetics of cavity polaritons by scattering with thermal acoustic phonons is studied within the rate equation approximation. Numerical results show that a suppression of the bottleneck of lower polariton states occurs at high polariton densities. We have found that the long decay time of the photon-like polaritons, the thin width of the embedded quantum wells and the small value of exciton-cavity detuning are favorable for the suppression of the bottleneck.