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Strong-field photoionization of intense laser fields by controlling optical singularities
Science China Physics, Mechanics & Astronomy ( IF 6.4 ) Pub Date : 2021-05-26 , DOI: 10.1007/s11433-021-1689-7
Yiqi Fang , Zhenning Guo , Peipei Ge , Xueyan Ma , Meng Han , Xiaoyang Yu , Yongkai Deng , Qihuang Gong , Yunquan Liu

The spatial features of a light field, such as in the form of the optical singularities, provide a new degree of freedom for the application of light fields in different areas of science and technology. However, although the exploration of structured light is growing rapidly, the investigation of strong-field photoionization using such light fields is noticeably lagging behind. Here, we present an experimental study that reveals the signatures of intense, structured light fields with controlled optical singularities in strong-field photoionization. The different types of optical singularities can be identified through photoionization observables, i.e., photoelectron momentum distributions (PMDs). By concurrently shifting the locations of the phase and polarization singularities, the focal electric field features can be designated, and subsequently, the photoionization appearances can be manipulated. In this process, the behaviors of the different intense optical singularities are clearly visualized by the PMDs. This work will advance both the strong-field science and singularity optics.



中文翻译:

通过控制光奇点对强激光场进行强场光电离

光场的空间特征,例如光学奇点的形式,为光场在不同科学技术领域的应用提供了新的自由度。然而,尽管对结构光的探索正在迅速发展,但使用这种光场的强场光电离研究明显滞后。在这里,我们提出了一项实验研究,揭示了强场光电离中具有受控光学奇点的强结构光场的特征。不同类型的光学奇点可以通过光电离观测值来识别,即光电子动量分布 (PMD)。通过同时移动相位奇点和极化奇点的位置,可以指定聚焦电场特征,随后,可以操纵光电离外观。在这个过程中,不同强光奇点的行为被 PMD 清楚地可视化。这项工作将推动强场科学和奇点光学。

更新日期:2021-05-31
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