Oscillatory pump–probe signals from delocalized wave packets
Oscillatory pump–probe signals from delocalized wave packets
复制标题
来自离域波包的振荡泵浦探测信号
DOI：
10.1063/1.1290699
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发表时间：
2000
影响因子：
4.4
通讯作者：
C. Meier
中科院分区：
文献类型：
--
作者：
V. A. Ermoshin;V. Engel;C. Meier
我们计算了I2分子飞秒激发的泵浦-探测信号。结果表明，尽管在泵浦过程中产生的振动波包在整个经典允许的区域内是离域的，但依赖于泵浦激光脉冲的参数，信号可以表现出规则的振荡行为。相应的结构可以与增强的概率密度的时间变化相关，而增强的概率密度又与潜在的经典运动相关。我们进一步证明，使用时间分辨光电子能谱允许表征的结构中出现的随时间变化的波函数。
We calculate pump–probe signals obtained from femtosecond excitation of I2 molecules. It is shown that, depending on the parameters of the pump laser-pulse, the signals can exhibit a regular oscillatory behavior although the vibrational wave packet which is produced in the pump process, is delocalized over the entire classically allowed region. The respective structures can be related to temporal variations of an enhanced probability density which, in turn, are related to the underlying classical motion. We further demonstrate that the use of time-resolved photoelectron spectroscopy allows for a characterization of the structures which appear in the time-dependent wave function.