Excitation localization effects in nanoscale molecular clusters (J-aggregates)

An analysis of experimental data from low-temperature selective spectroscopy and single J-aggregate spectroscopy reveals a hierarchy of exciton states within the confines of the absorption band of J-aggregates which are formed by relaxation of an excited state. For J-aggregates, which are characteri...

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Bibliographic Details
Published in:Low temperature physics (Woodbury, N.Y.) N.Y.), 2011-02, Vol.37 (2), p.157-162
Main Authors: Yefimova, S. L., Sorokin, A. V., Katrunov, I. K., Malyukin, Yu. V.
Format: Article
Language:English
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Summary:An analysis of experimental data from low-temperature selective spectroscopy and single J-aggregate spectroscopy reveals a hierarchy of exciton states within the confines of the absorption band of J-aggregates which are formed by relaxation of an excited state. For J-aggregates, which are characterized by substantial static disorder, strongly localized excitons are found in the long-wavelength edge of the absorption band; they have a discrete energy spectrum and jump mobility, and are not subject to strong relaxation. Delocalized (spatially extended) excitons are excited within the absorption band of the J-aggregates, except at its long-wavelength edge. They are characterized by coherent exciton transport and are the source of self-localized excitons.
ISSN:1063-777X
1090-6517
DOI:10.1063/1.3556666