Send to

Choose Destination
See comment in PubMed Commons below
Phys Rev Lett. 2005 Aug 26;95(9):097401. Epub 2005 Aug 26.

Power-law-distributed dark states are the main pathway for photobleaching of single organic molecules.

Author information

Applied Optics group, Faculty of Science & Technology and MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, NL-7500AE Enschede, the Netherlands.


We exploit the strong excitonic coupling in a superradiant trimer molecule to distinguish between long-lived collective dark states and photobleaching events. The population and depopulation kinetics of the dark states in a single molecule follow power-law statistics over 5 orders of magnitude in time. This result is consistent with the formation of a radical unit via electron tunneling to a time-varying distribution of trapping sites in the surrounding polymer matrix. We furthermore demonstrate that this radicalization process forms the dominant pathway for molecular photobleaching.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for American Physical Society
    Loading ...
    Support Center