Förster transfer outside the weak-excitation limit

The efficiency of resonance energy transfer can be used to determine nanometer-scale separations between dye molecules in a donor-acceptor pair. We argue that the standard method for making this determination in single-pair experiments is valid only when excitation by the applied field is much slowe...

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Veröffentlicht in:The Journal of chemical physics 2009-09, Vol.131 (10), p.104509-104509-5
Hauptverfasser: Camley, Brian A., Brown, Frank L. H., Lipman, Everett A.
Format: Artikel
Sprache:eng
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Zusammenfassung:The efficiency of resonance energy transfer can be used to determine nanometer-scale separations between dye molecules in a donor-acceptor pair. We argue that the standard method for making this determination in single-pair experiments is valid only when excitation by the applied field is much slower than the other photophysical processes in the system. We derive a simple relation between measured transfer efficiency and interdye distance that is valid regardless of excitation rate for a broad class of currently accepted models for dye photophysics. Significant deviations from weak-field results are predicted for typical experimental conditions.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.3230974