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- Delayed formation of coherence in the emission dynamics of high-Q nanolasers doi link

Auteur(s): Moody Galan, Segnon Mawussey, Sagnes Isabelle, Braive Rémy, Beveratos Alexios, Robert-Philip I., Belabas Nadia, Jahnke Frank, Silverman Kevin L., Mirin Richard P., Stevens Martin J., Gies Christopher

(Article) Publié: Optica, vol. 5 p.395 (2018)
Texte intégral en Openaccess : openaccess


Ref HAL: hal-01753921_v1
DOI: 10.1364/OPTICA.5.000395
WoS: 000430601100012
Exporter : BibTex | endNote
6 Citations
Résumé:

In the realization of ultrasmall semiconductor lasers, cavity-QED effects are used to enhance spontaneous emission and enable the lasing threshold to be crossed with gain contributions from only a few solid-state emitters. Operation in this regime fosters correlation effects that leave their fingerprint especially in the emission dynamics of nanolasers. Using time-resolved photon-correlation spectroscopy, we show that in a quantum-dot photonic-crystal nanolaser emitting in the telecom band, second-order coherence associated with lasing is established on a different timescale than the emission itself. By combining measurements with a microscopic semiconductor laser theory, we attribute the origin to carrier-photon correlations that give rise to non-Markovian effects in the emission dynamics that are not captured by laser rate-equation theories. Our results have direct implications with respect to the modulation response, repetition rate, noise characteristics, and coherence properties of nanolasers for device applications.