Ultrafast lensing effect of β-carotene in n-hexane solution

Kazuki Ito, Makiko Mutoh, Akira Harata, Tsuguo Sawada

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


An ultrafast lensing effect of photo-induced beam focusing and defocusing was observed for dilute all-trans-β-carotene solutions in n-hexane. Sub-picosecond pump and probe pulses were used with a low power semi-resonant excitation at 390 nm and a non-resonant probe at 780 nm. High speed averaging with intensity-modulated mode-locked pulse trains successfully provided a double exponential response where the pre-exponential factors had different signs. The time constants were 0.2 and 10 ps, respectively corresponding to those of two excited states of β-carotene. Similarity in lensing intensity dependence between the ultrafast effect and a slower thermal effect was also examined.

Original languageEnglish
Pages (from-to)349-354
Number of pages6
JournalChemical Physics Letters
Issue number3-4
Publication statusPublished - Aug 29 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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