Ultrafast dynamics of excited state in oxy-hemoglobin

Takayoshi Kobayashi; Atsushi Yabushita

doi:10.3788/COL201109.S10605

Ultrafast dynamics of excited state in oxy-hemoglobin

Takayoshi Kobayashi^*, Atsushi Yabushita

^*Corresponding author for this work

Department of Electrophysics

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

2 Scopus citations

Abstract

We perform ultrafast transient absorption spectroscopy of oxy-hemoglobin by a pump-probe method with ultrashort laser pulses. Negative time-range of the observed traces, where the pump pulse precedes the probe pulse, is analyzed to study the electronic coherence dynamics between the excited state and the ground state, and the vibrational coherence in the electronic excited state. The analysis result shows that the electronic coherence between the electronic ground state and the Q-band state dephases in 45±5 fs. The vibrational dephasing times of modes with frequencies of 210, 393, 554, 731, and 1106 cm^-1 are found to be 449, 366, 555, 1085, and >1330 fs, respectively.

Original language	English
Journal	Chinese Optics Letters
Volume	9
Issue number	SUPPL. 1
DOIs	https://doi.org/10.3788/COL201109.S10605
State	Published - 1 Jun 2011

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title = "Ultrafast dynamics of excited state in oxy-hemoglobin",

abstract = "We perform ultrafast transient absorption spectroscopy of oxy-hemoglobin by a pump-probe method with ultrashort laser pulses. Negative time-range of the observed traces, where the pump pulse precedes the probe pulse, is analyzed to study the electronic coherence dynamics between the excited state and the ground state, and the vibrational coherence in the electronic excited state. The analysis result shows that the electronic coherence between the electronic ground state and the Q-band state dephases in 45±5 fs. The vibrational dephasing times of modes with frequencies of 210, 393, 554, 731, and 1106 cm-1 are found to be 449, 366, 555, 1085, and >1330 fs, respectively.",

author = "Takayoshi Kobayashi and Atsushi Yabushita",

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language = "English",

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AU - Yabushita, Atsushi

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N2 - We perform ultrafast transient absorption spectroscopy of oxy-hemoglobin by a pump-probe method with ultrashort laser pulses. Negative time-range of the observed traces, where the pump pulse precedes the probe pulse, is analyzed to study the electronic coherence dynamics between the excited state and the ground state, and the vibrational coherence in the electronic excited state. The analysis result shows that the electronic coherence between the electronic ground state and the Q-band state dephases in 45±5 fs. The vibrational dephasing times of modes with frequencies of 210, 393, 554, 731, and 1106 cm-1 are found to be 449, 366, 555, 1085, and >1330 fs, respectively.

AB - We perform ultrafast transient absorption spectroscopy of oxy-hemoglobin by a pump-probe method with ultrashort laser pulses. Negative time-range of the observed traces, where the pump pulse precedes the probe pulse, is analyzed to study the electronic coherence dynamics between the excited state and the ground state, and the vibrational coherence in the electronic excited state. The analysis result shows that the electronic coherence between the electronic ground state and the Q-band state dephases in 45±5 fs. The vibrational dephasing times of modes with frequencies of 210, 393, 554, 731, and 1106 cm-1 are found to be 449, 366, 555, 1085, and >1330 fs, respectively.

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