Quantum kinetic theory of phonon-assisted carrier transitions in nitride-based quantum-dot systems

TL;DR

This paper develops a microscopic quantum kinetic theory to analyze how carriers in nitride-based quantum dots interact with LO phonons, revealing the impact of quasi-particle renormalizations and electrostatic fields on ultrafast carrier dynamics.

Contribution

It introduces a detailed microscopic model for carrier-phonon interactions in nitride quantum dots, highlighting the role of quasi-particle effects and electrostatic fields in ultrafast processes.

Findings

Scattering efficiency is linked to quasi-particle renormalizations.

Quantum confinement and polar coupling strongly modify electronic states.

Electrostatic fields do not hinder fast scattering channels.

Abstract

A microscopic theory for the interaction of carriers with LO phonons is used to study the ultrafast carrier dynamics in nitride-based semiconductor quantum dots. It is shown that the efficiency of scattering processes is directly linked to quasi-particle renormalizations. The electronic states of the interacting system are strongly modified by the combined influence of quantum confinement and polar coupling. Inherent electrostatic fields, typical for InGaN/GaN quantum dots, do not limit the fast scattering channels.