Ultrafast optical dynamics of excitons in J-aggregates

被引：22

作者：

Lee, JH ^{[1
]}

Min, CK ^{[1
]}

Joo, T ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Chem, Div Mol & Life Sci, Pohang 790784, South Korea

来源：

JOURNAL OF CHEMICAL PHYSICS | 2001年 / 114卷 / 01期

关键词：

D O I：

10.1063/1.1329133

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：

Time evolution of the coherence properties of excitons in J-aggregates of an organic molecule is studied by femtosecond transient absorption and three-pulse stimulated photon echo peak shifts. The exciton energy correlation function decays to zero by 120 fs single exponential, manifesting an ultrafast rupture of the coherent wave packet motion and the absence of inhomogeneity beyond the 100 fs time scale. Insensitivity of the correlation function to the isotopic substitution of the solvent suggests that the phonon modes of the molecular chain are responsible for the ultrafast dynamics. (C) 2001 American Institute of Physics.

引用

页码：377 / 381

页数：5

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