標題: Spectral modulation observed in Chl-a by ultrafast laser spectroscopy
作者: Du, Juan
Nakata, Kazuaki
Jiang, Yongliang
Tokunaga, Eiji
Kobayashi, Takayoshi
電子物理學系
Department of Electrophysics
公開日期: 7-十一月-2011
摘要: Broadband real-time dynamic vibronic coupling in Chl-a were experimentally studied using few cycle laser pulses of 6.8fs duration and a 128-channnel lock-in amplifier. Thanks to the extreme temporal resolution benefitting from the ultrashort laser pulse, the real-time modulation of the electronic transition energy induced by the molecular vibrations were calculated by the time dependent first moments of the bleaching band. The transition energy was found to be modulated periodically with the same frequencies of molecular vibration found in the Fourier amplitude spectrum of the difference absorbance real-time traces. This was interpreted to be due to the difference in the effective transition energy associated with the wavepacket motion induced by the equilibrium positions of potential curves between the ground state and the excited state. Using the values, Huang-Rhys factors for several vibrational modes involved in the spectral modulation at the room-temperature have been determined. (C)2011 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.19.022480
http://hdl.handle.net/11536/14660
ISSN: 1094-4087
DOI: 10.1364/OE.19.022480
期刊: OPTICS EXPRESS
Volume: 19
Issue: 23
起始頁: 22480
結束頁: 22485
顯示於類別:期刊論文


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  1. 000296904700028.pdf