Spectral modulation observed in Chl-a by ultrafast laser spectroscopy

被引：13

作者：

Du, Juan ^{[1
,2
,3
,4
]}

Nakata, Kazuaki ^{[5
]}

Jiang, Yongliang ^{[1
,2
,4
]}

Tokunaga, Eiji ^{[5
]}

Kobayashi, Takayoshi ^{[1
,2
,4
,6
,7
]}

机构：

[1] Univ ElectruCommun, Fac Informat & Engn, Adv Ultrafast Laser Res Ctr, Tokyo 1828585, Japan

[2] Univ Electrocommun, Fac Informat & Engn, Dept Engn Sci, Tokyo 1828585, Japan

[3] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China

[4] Japan Sci & Technol Agcy, Core Res Evolut Sci & Technol CREST, Kawaguchi, Saitama 3320012, Japan

[5] Tokyo Univ Sci, Fac Sci, Dept Phys, Shinjuku Ku, Tokyo 1628601, Japan

[6] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan

[7] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30010, Taiwan

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 23期

基金：

日本科学技术振兴机构;

关键词：

OPTICAL PARAMETRIC AMPLIFICATION; RESONANCE RAMAN-SPECTRA; CHLOROPHYLL-A; VISIBLE PULSE; FREQUENCY; FS;

D O I：

10.1364/OE.19.022480

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

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

引用

页码：22480 / 22485

页数：6

共 18 条

[1] Visible pulse compression to 4 fs by optical parametric amplification and programmable dispersion control [J].