Exciton transport in molecular aggregates probed by time and frequency gated optical spectroscopy

被引：39

作者：

Chernyak, V ^{[1
]}

Minami, T ^{[1
]}

Mukamel, S ^{[1
]}

机构：

[1] Univ Rochester, Dept Chem, Rochester, NY 14627 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2000年 / 112卷 / 18期

关键词：

D O I：

10.1063/1.481396

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The signatures of exciton relaxation in time-resolved fluorescence spectroscopy of molecular aggregates excited by a short pulse are expressed as an overlap of a Doorway wavepacket representing the exciton density matrix with a Window wavepacket which describes the time and frequency resolved detection. Transport and relaxation of the excitons are accounted for using the Redfield equations for the density matrix, and the complete temporal and spectral profiles of the excitation pulse and detection gate are incorporated using Wigner spectrograms. The spread in the off diagonal elements of the density matrix in the chromophore (real space) representation provides a natural measure of the relevant exciton coherence size. (C) 2000 American Institute of Physics. [S0021-9606(00)00518-3].

引用

页码：7953 / 7963

页数：11

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