# Picosecond control of quantum dot laser emission by coherent phonons

## TL;DR

This paper demonstrates how picosecond acoustic pulses can dynamically control quantum dot laser emission by shifting electronic transitions, enabling enhancement or suppression of lasing through coherent phonons.

## Contribution

It introduces a semiclassical model explaining phonon-induced control of quantum dot lasers, matching experimental results and revealing new control mechanisms.

## Key findings

- Lasing emission can be enhanced or suppressed by coherent phonons.
- Resonance tuning with phonons significantly affects laser output.
- The semiclassical model accurately predicts phonon-laser interactions.

## Abstract

A picosecond acoustic pulse can be used to control the lasing emission from semiconductor nanostructures by shifting their electronic transitions. When the active medium, here an ensemble of (In,Ga)As quantum dots, is shifted into or out of resonance with the cavity mode, a large enhancement or suppression of the lasing emission can dynamically be achieved. Most interesting, even in the case when gain medium and cavity mode are in resonance, we observe an enhancement of the lasing due to shaking by coherent phonons. In order to understand the interactions of the non-linearly coupled photon-exciton-phonon subsystems, we develop a semiclassical model and find an excellent agreement between theory and experiment.