Sub-5-fs two-dimensional spectroscopy of pseudoisocyanine J-aggregates

被引：9

作者：

Nishimura, K

Tokunaga, E

Kobayashi, T

机构：

[1] Univ Tokyo, Dept Phys, Grad Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan

[2] Sci Univ Tokyo, Dept Phys, Fac Sci, Shinjuku Ku, Tokyo 1628601, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 395卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2004.07.073

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 oscillations of the absorbance change due to molecular vibrations in pseudoisocyanine bromide J-aggregates were real-time resolved with sub-5-fs laser pulses. In spite of weak exciton-phonon coupling in the Frenkel exciton system, it was possible to observe the modulation of difference absorbance because of the enhanced transition moment. The non-Condon-type exciton-phonon coupling was invoked to explain the oscillatory signals and the transition dipole modulations were evaluated. The band at 38 cm(-1) was assigned to optical phonon mode, and the band at 152 cm(-1), which had never been detected in Raman scattering, was also real-time resolved. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：114 / 119

页数：6

共 31 条

[1] RAMAN EXCITATION-SPECTRA OF EXCITON-PHONON MODES OF AGGREGATED 2,2'-CYANINE USING AN INTERNAL RAMAN STANDARD [J].