Bunching and Antibunching in the Fluorescence of Single Nanocrystals

The fluorescence of single colloidal CdSe quantum dots is investigated at room temperature by means of the autocorrelation function over a time scale of almost 12 orders of magnitude. At short time, the autocorrelation function shows a complete antibunching indicating single photon emission and atom...

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Bibliographic Details
Published in:Optics letters 2001, Vol.26
Main Authors: Messin, Gaetan, Hermier, Jean-Pierre, Giacobino, Elisabeth, Desbiolles, Pierre, Dahan, Maxime
Format: Article
Language:English
Subjects:
Condensed Matter
Other
Physics
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Summary:The fluorescence of single colloidal CdSe quantum dots is investigated at room temperature by means of the autocorrelation function over a time scale of almost 12 orders of magnitude. At short time, the autocorrelation function shows a complete antibunching indicating single photon emission and atomic-like behavior. On longer time scales (up to tens of seconds), we measure a bunching effect due to fluorescence intermittency that can not be described by fluctuations between two states with constant rates. The autocorrelation function also exhibits a non-stationary behavior related to power-law distributions of "On" and "Off" times.
ISSN:0146-9592
1539-4794