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Proceedings Paper

Cavity-enhanced single photons from a quantum dot
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Paper Abstract

Single-photon sources rarely emit two or more photons in the same pulse, compared to a Poisson-distributed source of the same intensity, and have numerous applications in quantum information science. The quality of such a source is evaluated based on three criteria: high efficiency, small multi-photon probability, and quantum indistinguishability. We have demonstrated a single-photon source based on a quantum dot in a micropost microcavity that exhibits a large Purcell factor together with a small multi-photon probability. For a quantum dot on resonance with the cavity, the spontaneous emission rate has been increased by a factor of five, while the probability to emit two or more photons in the same pulse has been reduced to 2% compared to a Poisson-distributed source of the same intensity. The indistinguishability of emitted single photons from one of our devices has been tested through a Hong-Ou-Mandel-type two-photon interference experiment; consecutive photons emitted from such a source have been largely indistinguishable, with a mean wave-packet overlap as large as 0.81. We have also designed and demonstrated two-dimensional photonic crystal GaAs cavities containing InAs quantum dots that exhibit much higher quality factors together with much smaller mode volumes than microposts, and therefore present an ideal platform for construction of single photon sources of even higher quality.

Paper Details

Date Published: 28 April 2005
PDF: 11 pages
Proc. SPIE 5722, Physics and Simulation of Optoelectronic Devices XIII, (28 April 2005); doi: 10.1117/12.601822
Show Author Affiliations
Jelena Vuckovic, Stanford Univ. (United States)
David Fattal, Stanford Univ. (United States)
Dirk Englund, Stanford Univ. (United States)
Edo Waks, Stanford Univ. (United States)
Charles Santori, Stanford Univ. (United States)
Glenn Solomon, Stanford Univ. (United States)
Yoshihisa Yamamoto, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 5722:
Physics and Simulation of Optoelectronic Devices XIII
Marek Osinski; Fritz Henneberger; Hiroshi Amano, Editor(s)

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