Exciton Dephasing and Thermal Line Broadening in Molecular Aggregates

Details Exciton Dephasing and Thermal Line Broadening in Molecular Aggregates Exciton Dephasing and Thermal Line Broadening in Molecular Aggregates

2006-04-05

arxiv.org/abs/cond-mat/0604130v1

J. Lumin. 119-120, 271 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

11 pages, 3 PostScript figures

Scientific paper

10.1016/j.jlumin.2005.12.009

Using a model of Frenkel excitons coupled to a bath of acoustic phonons in the host medium, we study the temperature dependence of the dephasing rates and homogeneous line width in linear molecular aggregates. The model includes localization by disorder and predicts a power-law thermal scaling of the effective homogeneous line width. The theory gives excellent agreement with temperature dependent absorption and hole-burning experiments on aggregates of the dye pseudoisocyanine.

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