Time resolved scattering relaxation mechanisms of microcavity polaritons

TL;DR

This paper investigates the relaxation dynamics of microcavity polaritons, comparing phonon and electron scattering mechanisms, and demonstrates how electron scattering can more efficiently relax polaritons at low pump power.

Contribution

It introduces a detailed analysis of polariton relaxation mechanisms using the Boltzmann equation, highlighting the efficiency of electron scattering over phonons at low pump powers.

Findings

Electron scattering relaxes polaritons more efficiently at low pump power.

Different relaxation times exist for phonon and electron mechanisms.

The Boltzmann equation effectively models the relaxation dynamics.

Abstract

We study the polariton relaxation dynamics for different scattering mechanisms as: Phonon and electron scattering procesess. The relaxation polariton is obtained at very short times by solving the Boltzman equation. Instead of the well-known relaxation process by phonons, we show that the bottleneck effect relaxes to the ground state more efficiently at low pump power intensity when the electron relaxation process is included. In this way, we clearly demonstrate that different relaxation times exist, for which any of these two mechanism is more efficient to relax the polariton population to the ground state.