FEMTOSECOND MULTIPLE-PULSE IMPULSIVE STIMULATED RAMAN-SCATTERING SPECTROSCOPY

被引:160
作者
WEINER, AM [1 ]
LEAIRD, DE [1 ]
WIEDERRECHT, GP [1 ]
NELSON, KA [1 ]
机构
[1] MIT,DEPT CHEM,CAMBRIDGE,MA 02139
关键词
D O I
10.1364/JOSAB.8.001264
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Optical control of elementary molecular motion through impulsive stimulated Raman scattering is enhanced by means of timed sequences of femtosecond pulses that are produced by pulse-shaping techniques. In particular, terahertz-rate trains of femtosecond pulses are used for repetitive impulsive excitation of individual phonon modes in an alpha-perylene molecular crystal. When the pulse repetition rate is matched to the desired phonon frequency, mode-selective vibrational amplification is achieved. A comparison of data acquired with the transient-grating and the pump-probe experimental geometries reveals the timing dynamics of the induced phonon oscillations with respect to the driving femtosecond pulse sequence.
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页码:1264 / 1275
页数:12
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