# Systematic study of the influence of coherent phonon wave packets on the lasing properties of a quantum dot ensemble

## TL;DR

This paper provides a comprehensive theoretical analysis of how coherent phonon wave packets influence the lasing properties of quantum dot ensembles, revealing mechanisms for controlled laser emission modulation.

## Contribution

It introduces a detailed theoretical framework to distinguish effects of phonon pulses on quantum dot lasers, enabling phonon-controlled laser emission.

## Key findings

- Phonon pulses can significantly enhance or attenuate laser emission.
- Distinct effects of adiabatic shifting and shaking are identified.
- The study offers insights into phonon-mediated control of laser properties.

## Abstract

Coherent phonons can greatly vary light-matter interaction in semiconductor nanostructures placed inside an optical resonator on an ultrafast time scale. For an ensemble of quantum dots as active laser medium phonons are able to induce a large enhancement or attenuation of the emission intensity, as has been recently demonstrated. The physics of this coupled phonon-exciton-photon system consists of various effects, which in the experiment typically cannot be clearly separated, in particular because a rather complex strain pulse impinges on the quantum dot ensemble. Here we present a comprehensive theoretical study how the laser emission is affected by phonon pulses of various shapes as well as by ensembles with different spectral distributions of the quantum dots. This gives insight into the fundamental interaction dynamics of the coupled phonon-exciton-photon system, while it allows us to clearly discriminate between two prominent effects: the adiabatic shifting of the ensemble and the shaking effect. This paves the way to a tailored laser emission controlled by phonons.