时间积分量子跃迁图象中高次谐波的产生
High-order Harmonic Generation in a Time-integrated Quantum Transition Picture
摘要:
发展了一种研究强激光与物质相互作用中高次谐波产生的数值方法。通过跟踪每个电子无激光场态的时间演化,我们在时间积分的量子跃迁图中“观察”到了高次谐波。我们的全量子模拟揭示了具有宽能量分布的连续电子对一个谐波的贡献相等,并且激发态在分子高次谐波中也起着重要的作用。这些结果意味着在高次谐波分子内干涉的激光强度依赖的图片。
英文摘要:
We develop a numerical scheme to investigate the high-order harmonic generation (HHG) in intense laser-matter interactions. Tracing the time evolution of every electronic laser-field-free state, we "observe" the HHG in a time-integrated quantum transition picture. Our full-quantum simulations reveal that continuum electrons with a broad energy distribution contribute equally to one harmonic and the excited state also plays an important role in the molecular HHG. These results imply a laser-intensity-dependent picture of intramolecular interference in the HHG.
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