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Phys. Rev. Lett. 89, 093601 (2002) [4 pages]

Direct Measurement of the Photon Statistics of a Triggered Single Photon Source

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F. Treussart1,*, R. Alléaume1, V. Le Floc’h1, L. T. Xiao1,†, J.-M. Courty2, and J.-F. Roch1
1Laboratoire de Photonique Quantique et Moléculaire, ENS Cachan, 61 Avenue du Président Wilson, 94235 Cachan Cedex, France
2Laboratoire Kastler Brossel, UPMC case 74, four place Jussieu, 75252 Paris Cedex 05, France

Received 22 February 2002; published 13 August 2002

We studied intensity fluctuations of a single photon source relying on the pulsed excitation of the fluorescence of a single molecule at room temperature. We directly measured the Mandel parameter Q(T) over 4 orders of magnitude of observation time scale T by recording every photocount. On time scale of a few excitation periods, sub-Poissonian statistics is clearly observed and the probablility of two-photons events is 10 times smaller than Poissonian pulses. On longer times, blinking in the fluorescence, due to the molecular triplet state, produces an excess of noise.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.093601
DOI:
10.1103/PhysRevLett.89.093601
PACS:
42.50.Dv, 03.67.Dd, 33.50.–j

*Electronic address: treussar@physique.ens-cachan.fr

†Permanent address: Department of Electronics & Information Technology, Shanxi University, Taiyuan, China.

‡Laboratoire du CNRS, UMR 8537, associé à l’École Normale Supérieure de Cachan.

§Laboratoire de l’École Normale Supérieure et de l’Université Pierre et Marie Curie, associé au CNRS.

 
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