Alignment dependence of photoelectron momentum distributions for diatomic molecules N$_2$ in strong elliptical laser fields

Dianxiang Ren; Shang Wang; Chao Chen; Xiaokai Li; Xitao Yu; Xinning Zhao; Pan Ma; Chuncheng Wang; Sizuo Luo; Yanjun Chen; Dajun Ding

doi:10.1088/1361-6455/ac8214

arXiv · 2105.07619

Alignment dependence of photoelectron momentum distributions for diatomic molecules N$_2$ in strong elliptical laser fields

Dianxiang Ren·Shang Wang·Chao Chen·Xiaokai Li·Xitao Yu·Xinning Zhao·Pan Ma·Chuncheng Wang·Sizuo Luo·Yanjun Chen·Dajun Ding

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Abstract

We study ionization dynamics of aligned diatomic molecules N$_2$ in strong elliptical laser fields experimentally and theoretically. The alignment dependence of photoelectron momentum distributions (PMDs) of N$_2$ measured in experiments is highlighted with comparing to Ar measured synchronously. Our results show that the PMDs of N$_2$ depend strongly on the alignment of the molecule, relative to the main axis of the laser ellipse. In particular, the most-probable electron-emission angle which is often used in attosecond measurement, differs remarkably when changing the molecular alignment. We show that the interplay of two-center interference and tunneling when the electron goes through the laser-Coulomb-formed barrier, plays an important role in these phenomena. Our work gives suggestions on studying ultrafast electron motion inside aligned molecules.

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Dianxiang Ren, Shang Wang, Chao Chen, Xiaokai Li, Xitao Yu, Xinning Zhao, Pan Ma, Chuncheng Wang, Sizuo Luo, Yanjun Chen, Dajun Ding. 2021-05-17. Alignment dependence of photoelectron momentum distributions for diatomic molecules N$_2$ in strong elliptical laser fields. https://doi.org/10.1088/1361-6455%2Fac8214

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