Ultrafast dynamics in a series of carotenoids investigated by time-resolved stimulated Raman spectroscopy

Masayuki Yoshizawa, Hideki Hashimoto

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


Vibrational relaxation in excited states of all-trans-carotenoids has been investigated using femtosecond stimulated Raman spectroscopy with resolutions of 250 fs and 25 cm-1. The initially photoexcited 1Bu + state in carotenoids relaxes to the 2Ag- excited state within 1 ps. The 1Bu- excited state is an intermediate state of the relaxation. After the relaxation to the 2A g- state, the excess energy is held in a C=C stretching mode (ν1) and remains longer than several picoseconds in short (mini) carotenes. Vibrational feature of carotenoids is of importance in energy transfer of photosynthesis. Femtosecond time-resolved vibrational spectroscopy is necessary to investigate the initial ultrafast kinetics.

Original languageEnglish
Pages (from-to)13-22
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2003
EventLinear and Nonlinear Optics of Organic Materials III - San Diego, CA, United States
Duration: 2003 Aug 42003 Aug 6


  • Carotenoid
  • Femtosecond Raman Spectroscopy
  • Vibrational Relaxation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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