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PreprintCC BY 4.0arXiv

Coherent dynamics of individual excitons in a quantum dot embedded in a nanopost

  • Maxime Gaignard
  • Karolina Ewa Polczynska
  • Niels Gregersen
  • Daniel Wigger
  • Jean-Philippe Poizat
  • Jean-Michel Gérard
  • Julien Claudon
  • Jacek Kasprzak
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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 over a broad spectral range of 30 nm. 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.

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Cite

BibTeXRIS
BibTeX
@misc{gaignard2026coherent,
  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},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2607.09419},
  eprint = {2607.09419},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2607.09419},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Coherent dynamics of individual excitons in a quantum dot embedded in a nanopost
AU  - Maxime Gaignard
AU  - Karolina Ewa Polczynska
AU  - Niels Gregersen
AU  - Daniel Wigger
AU  - Jean-Philippe Poizat
AU  - Jean-Michel Gérard
AU  - Julien Claudon
AU  - Jacek Kasprzak
PY  - 2026
DA  - 2026/10/14
PB  - arXiv
DO  - 10.48550/arxiv.2607.09419
UR  - https://arxiv.org/abs/2607.09419
AB  - 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 over a broad spectral range of 30 nm. 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.
ER  -