物理
激光器
原子物理学
极化(电化学)
领域(数学)
电子
离子
高次谐波产生
光学
谱线
量子力学
化学
数学
物理化学
纯数学
作者
Yi Zheng,Hanhu Diao,Zhinan Zhang,Xiaochun Ge,Ruxin Li,Zhizhan Xu
标识
DOI:10.1103/physreva.92.033417
摘要
As one of the most important physical processes of strong-field laser-matter interaction, laser-driven electron-ion recollision depends sensitively on the polarization of the laser field and can be effectively manipulated via an orthogonally polarized two-color (OTC) laser field. Here we present an extension of recollision manipulation in an OTC field to the midinfrared laser field regime, and demonstrate that only a few recollisions occur in a multicycle $1800/900\phantom{\rule{0.16em}{0ex}}\mathrm{nm}$ OTC laser field. The number of recollisions can be controlled by simply tuning the relative delay of the two-color laser pulses, and this manipulation process can be visualized by measuring the high-order harmonic spectra. When the intensity of a midinfrared OTC field is further increased, a single recollision can be correlated to one hump in the harmonic spectrum, which will help to increase the measurement accuracy of time-resolved dynamics in atoms and molecules.
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