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arXiv:0804.2740 · Nature Physics

Coherent generation of non-classical light on a chip via photon-induced tunnelling and blockade

Andrei Faraon, Ilya Fushman, Dirk Englund, Nick Stoltz, Pierre M. Petroff, Jelena Vuckovic A

Published Sep 21, 2008• 673 citations
arXivHTMLPDF
DOI
10.1038/nphys1078

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The on-chip generation of nonclassical states of light is a key requirement for future optical quantum hardware. In solid-state cavity quantum electrodynamics, such nonclassical light can be generated from self-assembled quantum dots strongly coupled to photonic crystal cavities. Their anharmonic strong light-matter interaction results in large optical nonlinearities at the single photon level, where the admission of a single photon into the cavity may enhance (photon tunneling) or diminish (photon blockade) the probability for a second photon to enter the cavity. Here, we demonstrate that detuning the cavity and quantum-dot resonances enables the generation of high-purity nonclassical light from strongly coupled systems. For specific detunings we show that not only the purity but also the efficiency of single-photon generation increases significantly, making high-quality single-photon generation by photon blockade possible with current state-of-the-art samples.
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