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Photon antibunching from a single quantum-dot-microcavity system in the strong coupling regime. 2007
David Press, and
Stephan Götzinger, and
Stephan Reitzenstein, and
Carolin Hofmann, and
Andreas Löffler, and
Martin Kamp, and
Alfred Forchel, and
Yoshihisa Yamamoto
Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305-4085, USA. dlpress@stanford.edu
We observe antibunching in the photons emitted from a strongly coupled single quantum dot and pillar microcavity in resonance. When the quantum dot was spectrally detuned from the cavity mode, the cavity emission remained antibunched, and also anticorrelated from the quantum dot emission. Resonant pumping of the selected quantum dot via an excited state enabled these observations by eliminating the background emitters that are usually coupled to the cavity. This device demonstrates an on-demand single-photon source operating in the strong coupling regime, with a Purcell factor of 61+/-7 and quantum efficiency of 97%.
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