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

doi:10.1134/S1054660X06020204

Ultrafast optical responses of three-level systems in β-carotene: Resonance to a high-lying n¹A_g ^- Excited state

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

SCI - Physics

Research output: Contribution to journal › Article › peer-review

18 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 language	English
Pages (from-to)	325-330
Number of pages	6
Journal	Laser Physics
Volume	16
Issue number	2
DOIs	https://doi.org/10.1134/S1054660X06020204
Publication status	Published - 2006 Feb

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

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.",

author = "M. Yoshizawa and D. Kosumi and M. Komukai and H. Hashimoto",

note = "Funding Information: ACKNOWLEDGMENTS This research was supported by JSPS.KAKENHI, grant no. 14340089 to M.Y. and H.H. and grant nos. 14340090 and 14654072 to H.H. This work was supported in part by the Ministry of Education, Culture, Sports, Science, and Technology through a 21st Century COE Program “Exploring New Science by Bridging Particle-Matter Hierarchy.”",

year = "2006",

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doi = "10.1134/S1054660X06020204",

language = "English",

volume = "16",

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journal = "Laser Physics",

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T1 - Ultrafast optical responses of three-level systems in β-carotene

T2 - Resonance to a high-lying n1Ag - Excited state

AU - Yoshizawa, M.

AU - Kosumi, D.

AU - Komukai, M.

AU - Hashimoto, H.

N1 - Funding Information: ACKNOWLEDGMENTS This research was supported by JSPS.KAKENHI, grant no. 14340089 to M.Y. and H.H. and grant nos. 14340090 and 14654072 to H.H. This work was supported in part by the Ministry of Education, Culture, Sports, Science, and Technology through a 21st Century COE Program “Exploring New Science by Bridging Particle-Matter Hierarchy.”

PY - 2006/2

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N2 - 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.

AB - 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.

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Ultrafast optical responses of three-level systems in β-carotene: Resonance to a high-lying n¹A_g ^- Excited state

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