Nonlinear relaxation of 0-dimension-trapped microcavity polaritons

TL;DR

This paper investigates the emission behavior of confined microcavity polaritons in zero-dimensional traps, revealing nonlinear relaxation regimes, coupling transitions, and lasing phenomena under different detuning conditions.

Contribution

It provides new insights into the nonlinear relaxation processes and coupling regime transitions of microcavity polaritons in zero-dimensional traps.

Findings

Nonlinear increase in emission intensity due to carrier-carrier scattering.

Transition from strong to weak coupling regime.

Observation of single-mode lasing.

Abstract

We study the emission properties of confined polariton states in shallow zero-dimensional traps under non-resonant excitation. We evidence several relaxation regimes. For slightly negative photon-exciton detuning, we observe a nonlinear increase of the emission intensity, characteristic of carrier-carrier scattering assisted relaxation under strong-coupling regime. This demonstrates the efficient relaxation towards a confined state of the system. For slightly positive detuning, we observe the transition from strong to weak coupling regime and then to single-mode lasing.