Coherent dynamics of individual excitons in a quantum dot embedded in a nanopost
Mesoscale and Nanoscale Physics
2026-07-10 v1
Abstract
We measured coherent ultrafast dynamics of exciton complexes in a single strongly-confined InAs quantum dot embedded in a GaAs nanopost. Such a photonic structure combines a wave guiding with a cavity effect and assures an enhanced light-matter coupling. Coherence properties of an exciton-biexciton system hosted by a quantum dot are assessed with four-wave mixing microscopy. Our results show that this broad-band photonic structure is an excellent asset to probe coherent couplings in a small set of solid state quantum systems and to investigate the coherence dynamics within the level structure of their excited states.
Keywords
Cite
@article{arxiv.2607.09419,
title = {Coherent dynamics of individual excitons in a quantum dot embedded in a nanopost},
author = {Maxime Gaignard and Karolina Ewa Polczynska and Niels Gregersen and Daniel Wigger and Jean-Philippe Poizat and Jean-Michel Gérard and Julien Claudon and Jacek Kasprzak},
journal= {arXiv preprint arXiv:2607.09419},
year = {2026}
}