Explanation of photon correlations in the far-off-resonance optical emission from a quantum-dot-cavity system

Martin Winger, Thomas Volz, Guillaume Tarel, Stefano Portolan, Antonio Badolato, Kevin J. Hennessy, Evelyn L. Hu, Alexios Beveratos, Jonathan Finley, Vincenzo Savona, Ataç Imamoǧlu

Research output: Contribution to journalArticlepeer-review

190 Scopus citations

Abstract

In a coupled quantum-dot-nanocavity system, the photoluminescence from an off-resonance cavity mode exhibits strong quantum correlations with the quantum-dot transitions, even though its autocorrelation function is classical. Using new pump-power dependent photon-correlation measurements, we demonstrate that this seemingly contradictory observation that has so far defied an explanation stems from cascaded cavity photon emission in transitions between excited multiexciton states. The mesoscopic nature of quantum-dot confinement ensures the presence of a quasicontinuum of excitonic transitions, part of which overlaps with the cavity resonance.

Original languageEnglish
Article number207403
JournalPhysical Review Letters
Volume103
Issue number20
DOIs
StatePublished - 12 Nov 2009

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