Modeling quantum cascade lasers: Coupled electron and phonon transport far from equilibrium and across disparate spatial scales

TL;DR

This paper discusses advanced multiphysics and multiscale simulations of quantum cascade lasers, focusing on charge and heat transport far from equilibrium, addressing the complex coupling of electronic and phonon systems across different spatial scales.

Contribution

It introduces a novel simulation framework for modeling far-from-equilibrium coupled electron and phonon transport in quantum cascade lasers.

Findings

Enhanced understanding of charge and heat dynamics in QCLs

Framework applicable to other far-from-equilibrium nanoscale devices

Insights into multiscale coupling effects in laser operation

Abstract

Quantum cascade lasers (QCLs) are high-power coherent light sources in the midinfrared and terahertz parts of the electromagnetic spectrum. They are devices in which the electronic and lattice systems are far from equilibrium, strongly coupled to one another, and the problem bridges disparate spatial scales. We present our ongoing work on the multiphysics and multiscale simulation of far-from-equilibrium transport of charge and heat in midinfrared QCLs.