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Progress in cavity quantum electrodynamics (cQED) trends to decreasing mode volume and increasing light-matter interaction. We demonstrate a metal-semiconductor nanopillar cQED system that exhibits bright single-photon generation, strong Purcell enhancement, and viability as a new platform for cQED.
We show that the use of a coupled cavity or a bimodal cavity can improve single photon generation significantly relative to a single quantum dot strongly coupled to a cavity.
Through experimental study of an array of coupled photonic crystal cavities, we find that the intercavity coupling is significantly larger than the fabrication-induced disorder, a necessary condition for the generation of strongly correlated photons.
We demonstrate off-resonant coupling between a single quantum dot and a nanobeam photonic crystal cavity, under resonant excitation of the dot or the cavity. We confirm that this is an incoherent phonon-mediated process.
Off-resonant quantum dot-cavity coupling is studied both experimentally and theoretically. A theoretical model is proposed to explain the observations.
The experiments show that the coupled QD-cavity system is a promising candidate for probing CQED as well as for optical information processing. Our present work includes building of a three level system in a QD coupled to cavity, which is essential for construction of any quantum information processing devices.
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