Exciton Dephasing and Thermal Line Broadening in Molecular Aggregates
arXiv:cond-mat/0604130 · doi:10.1016/j.jlumin.2005.12.009
Abstract
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.
11 pages, 3 PostScript figures
References in corpus (3)
- Decoherence of Excitons in Multichromophore Systems: Thermal Line Broadening and Destruction of Superradiant Emission
- Temperature dependent fluorescence in disordered Frenkel chains: interplay of equilibration and local band-edge level structure
- Thermal broadening of the J-band in disordered linear molecular aggregates: A theoretical study