Attosecond probing of vibrational dynamics with high-harmonic generation
Attosecond probing of vibrational dynamics with high-harmonic generation
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DOI：
10.1103/physrevlett.94.053004
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发表时间：
2005-02-11
影响因子：
8.6
通讯作者：
Lein, M
中科院分区：
文献类型：
--
作者：
Lein, M
对氢分子在短周期激光脉冲作用下振动时的薛定谔方程进行了数值求解，结果表明高次谐波的产生对激光诱导的振动运动非常敏感。较重的同位素会产生更强的谐波，这种差异随着谐波频率的增加而增加。解析理论揭示了谐波对振动自相关函数的依赖性。在遗传算法的帮助下，可以在亚fs的时间分辨率下从谐波谱中重建核运动。
The numerical solution of the time-dependent Schrodinger equation for vibrating hydrogen molecules in few-cycle laser pulses shows that high-harmonic generation is sensitive to the laser-induced vibrational motion. More intense harmonics are generated in heavier isotopes, the difference increasing with the harmonic frequency. Analytical theory reveals a dependence of the harmonics on the vibrational autocorrelation function. With the help of a genetic algorithm, the nuclear motion can be reconstructed from the harmonic spectra with sub-fs time resolution.