Ultrafast optical responses of three-level systems in β-carotene: Resonance to a high-lying n1Ag - Excited state

M. Yoshizawa, D. Kosumi, M. Komukai, H. Hashimoto

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Ultrafast optical phenomena in all-trans-β-carotene have been investigated by femtosecond absorption and fluorescence spectroscopy. Following a resonant pump pulse, both fluorescence and absorbance changes have a decay time of 150 fs. The signals are assigned to the lowest optically allowed singlet excited state, 11 B u + . Transmittance changes induced by nonresonant pump pulses depend on the pump photon energy. They are interpreted in terms of the ac Stark effect in three-level systems and two-photon absorption of the pump and probe pulses generating a high-lying n 1 A g - state.

Original languageEnglish
Pages (from-to)325-330
Number of pages6
JournalLaser Physics
Volume16
Issue number2
DOIs
Publication statusPublished - 2006 Feb 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Industrial and Manufacturing Engineering

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