Photon statistics and dynamics of Fluorescence Resonance Energy Transfer

Details Photon statistics and dynamics of Fluorescence Resonance Energy Transfer Photon statistics and dynamics of Fluorescence Resonance Energy Transfer

2002-06-16

arxiv.org/abs/cond-mat/0206301v1

Physics

Condensed Matter

4 pages, 4 figures, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.89.068101

We report high time-resolution measurements of photon statistics from pairs of dye molecules coupled by fluorescence resonance energy transfer (FRET). In addition to quantum-optical photon antibunching, we observe photon bunching on a timescale of several nanoseconds. We show by numerical simulation that configuration fluctuations in the coupled fluorophore system could account for minor deviations of our data from predictions of basic Forster theory. With further characterization we believe that FRET photon statistics could provide a unique tool for studying DNA mechanics on timescales from 10^-9 to 10^-3 s.

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