title: Explanation of photon correlations in the far-off-resonance optical emission from a quantum-dot-cavity system.
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.
authors.affiliation: Institute of Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland.
authors.forename: Martin
authors.initials: M
authors.lastname: Winger
authors.forename: Thomas
authors.initials: T
authors.lastname: Volz
authors.forename: Guillaume
authors.initials: G
authors.lastname: Tarel
authors.forename: Stefano
authors.initials: S
authors.lastname: Portolan
authors.forename: Antonio
authors.initials: A
authors.lastname: Badolato
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Hennessy
authors.forename: Evelyn L
authors.initials: EL
authors.lastname: Hu
authors.forename: Alexios
authors.initials: A
authors.lastname: Beveratos
authors.forename: Jonathan
authors.initials: J
authors.lastname: Finley
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Savona
authors.forename: Ataç
authors.initials: A
authors.lastname: Imamoğlu