Phys. Rev. Lett. 93, 260601 (2004) [4 pages]Recurrence and Photon Statistics in Fluorescence Fluctuation SpectroscopyReceived 20 August 2004; published 20 December 2004 We report on fluorescence fluctuations of nanoparticles diffusing through a laser focus. Subject to an intensity threshold the fluorescence signal is transformed into time traces of on and off periods. The distribution functions of the experimental on and off times follow power laws t-α over several orders of magnitude with exponents α≃1.5-2. At long times the distribution functions cross over to exponential decays. For the interpretation of the experimental data a diffusion-reaction equation is proposed which covers both, the diffusion controlled recurrence and the photon statistics as the relevant processes. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.260601
DOI:
10.1103/PhysRevLett.93.260601
PACS:
05.40.Jc, 82.37.–j, 87.64.Tt
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