Vibrational relaxation of the 2 Ag excited state in all-trans-β-carotene obtained by femtosecond time-resolved Raman spectroscopy

M. Yoshizawa, H. Aoki, H. Hashimoto

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103 Citations (Scopus)

Abstract

Relaxation kinetics in all-trans-β-carotene has been investigated by recently developed femtosecond Raman spectroscopy. We observed the stimulated Raman signal of the 2 Ag excited state which is converted from the photogenerated 1B+u state. The vibrational relaxation in the 2 Ag state takes place within 0.6 ps until the l = 1 vibrational level, but the relaxation from the l = 1 evel to the l = 0 level is slower than 10 ps. The unusual kinetics is explained in terms of the 1 Bu state which exists between the l = 1 and l = 2 levels of the 2 Ag state.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number18
DOIs
Publication statusPublished - 2001 Apr 3

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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