EXCITON DYNAMICS IN DISORDERED MOLECULAR AGGREGATES - DISPERSIVE DEPHASING PROBED BY PHOTON-ECHO AND RAYLEIGH-SCATTERING

被引：27

作者：

FIDDER, H ^{[1
]}

WIERSMA, DA ^{[1
]}

机构：

[1] UNIV GRONINGEN,DEPT CHEM,CTR MAT SCI,ULTRAFAST LASER & SPECT LAB,NIJENBORGH 4,9747 AG GRONINGEN,NETHERLANDS

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 45期

关键词：

D O I：

10.1021/j100147a008

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：

Results are presented of absorption, fluorescence, accumulated photon echo, and resonance Rayleigh scattering experiments on aggregates of a thiacarbocyanine (TC) dye. In the echo experiments the dephasing time constant is found to vary strongly with excitation wave length; a similar effect is observed in resonance Rayleigh scattering. All data can be, interpreted using a one-dimensional Frenkel exciton Hamiltonian with diagonal disorder. In this model the dispersion of the dephasing time constant is due to an energy-dependent exciton-phonon scattering process. The effective frequency-dependent electron-phonon coupling constant is found to be a fractal power of frequency.

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页码：11603 / 11610

页数：8

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