Determination of wave packet dynamics by femtosecond time-resolved pump-dump-probe and four-wave mixing techniques

被引：23

作者：

Chen, T ^{[1
]}

Engel, V ^{[1
]}

Heid, M ^{[1
]}

Kiefer, W ^{[1
]}

Knopp, G ^{[1
]}

Materny, A ^{[1
]}

Meyer, S ^{[1
]}

Pausch, R ^{[1
]}

Schmitt, M ^{[1
]}

Schwoerer, H ^{[1
]}

Siebert, T ^{[1
]}

机构：

[1] Univ Wurzburg, Inst Phys Chem, D-97074 Wurzburg, Germany

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1999年 / 481卷

关键词：

femtochemistry; nonlinear spectroscopy; four-wave mixing; femtosecond spectroscopy; ground state wave packet dynamics;

D O I：

10.1016/S0022-2860(98)00651-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Femtosecond time-resolved four-wave mixing (FWM) spectroscopy is performed in order to investigate molecular dynamics in iodine molecules in the gas phase. Depending on both the timing of the laser pulses and on the applied FWM technique different dynamics are observed in the FWM transient signals. By using the time-evolution diagrams the varying contribution of ground and excited state dynamics can be explained conclusively. Further, a femtosecond three-color pump-dump-probe scheme in combination with a time-of-flight mass selective detection unit has been applied to study vibrational wave packet dynamics in the electronic ground state of cold K-2 molecules. A spectral analysis of the time domain signal reveals two different wave packet contributions: hot wave packets from a stimulated Raman process and cold ones from stimulated emission pumping. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：33 / 43

页数：11

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