Ultrafast coherent spectroscopic investigation on photosynthetic pigment chlorophyll a utilizing 20 fs pulses
Ultrafast coherent spectroscopic investigation on photosynthetic pigment chlorophyll a utilizing 20 fs pulses
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DOI：
10.1016/j.jphotochem.2015.06.025
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发表时间：
2015-12-01
影响因子：
4.3
通讯作者：
Hashimoto, Hideki
中科院分区：
文献类型：
--
作者：
Kosumi, Daisuke;Nishiguchi, Tomoya;Hashimoto, Hideki
用简并三脉冲四波混频光谱（瞬态光栅和光子回波）研究了溶液中光合色素叶绿素a的振动动力学。在四波混频信号中，清晰地观察到分子内振动的实时波包运动。在相干振荡的傅里叶变换功率谱中，在200 ~ 1400 cm（-1）能量范围内，发现了12个由叶绿素a引起的振动模。我们证明了一个特定的光-物质相互作用可以通过控制第一和第二脉冲之间的时间间隔来增强。(C)2015爱思唯尔B. V.保留所有权利。
Vibrational dynamics of the photosynthetic pigment chlorophyll a in solution have been investigated by degenerated three-pulse four-wave mixing spectroscopies (transient grating and photon echo) using 20 fs pulses. Real-time wave-packet motions of intramolecular vibrations were clearly observed in four-wave mixing signals. Twelve vibrational modes due to chlorophyll a in the region of energy ranging from 200 to 1400 cm(-1) were found in the Fourier transform power spectra of coherent oscillations. We demonstrate that a specific light-matter interaction can be enhanced by a control of the temporal separation between the first and second pulses. (C) 2015 Elsevier B.V. All rights reserved.