Decoherence of Excitons in Multichromophore Systems: Thermal Line Broadening and Destruction of Superradiant Emission

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dc.creatorHeijs, D. J.
dc.creatorMalyshev, V. A.
dc.creatorKnoester, J.
dc.date2005-09-16
dc.date.accessioned2026-07-07T06:21:47Z
dc.date.available2026-07-07T06:21:47Z
dc.descriptionWe study the temperature-dependent dephasing rate of excitons in chains of chromophores, accounting for scattering on static disorder as well as acoustic phonons in the host matrix. From this we find a powerlaw temperature dependence of the absorption line width, in excellent quantitative agreement with experiments on dye aggregates. We also propose a relation between the line width and the exciton coherence length imposed by the phonons. The results indicate that the much debated steep rise of the fluorescence lifetime of pseudo-isocyanine aggregates above 40 K results from the fact that this coherence length drops below the localization length imposed by static disorder.
dc.description4 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0509444
dc.identifierhttp://arxiv.org/abs/cond-mat/0509444
dc.identifierPhys. Rev. Lett. 95, 177402 (2005)
dc.identifierdoi:10.1103/PhysRevLett.95.177402
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95715
dc.subjectOther Condensed Matter
dc.titleDecoherence of Excitons in Multichromophore Systems: Thermal Line Broadening and Destruction of Superradiant Emission
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