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arXiv · 2110.08601

Magnetic-field effect in high-order above-threshold ionization

Kang Lin·Simon Brennecke·Hongcheng Ni·Xiang Chen·Alexander Hartung·Daniel Trabert·Kilian Fehre·Jonas Rist·Xiao-Min Tong·Joachim Burgdörfer·Lothar. Ph. H. Schmidt·Markus S. Schöffler·Till Jahnke·Maksim Kunitski·Feng He·Manfred Lein·Sebastian Eckart·Reinhard Dörner
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Abstract

We experimentally and theoretically investigate the influence of the magnetic component of an electromagnetic field on high-order above-threshold ionization of xenon atoms driven by ultrashort femtosecond laser pulses. The nondipole shift of the electron momentum distribution along the light-propagation direction for high energy electrons beyond the classical cutoff is found to be vastly different from that below the cutoff. A V-shape structure in the momentum dependence of the nondipole shift above the cutoff is identified for the first time. With the help of classical and quantum-orbit analysis, we show that large-angle rescattering of the electrons strongly alters the partitioning of the photon momentum between electron and ion. The sensitivity of the observed nondipole shift to the electronic structure of the target atom is confirmed by three-dimensional time-dependent Schr\"odinger equation simulations for different model potentials.

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Kang Lin, Simon Brennecke, Hongcheng Ni, Xiang Chen, Alexander Hartung, Daniel Trabert, Kilian Fehre, Jonas Rist, Xiao-Min Tong, Joachim Burgdörfer, Lothar. Ph. H. Schmidt, Markus S. Schöffler, Till Jahnke, Maksim Kunitski, Feng He, Manfred Lein, Sebastian Eckart, Reinhard Dörner. 2021-10-16. Magnetic-field effect in high-order above-threshold ionization. https://doi.org/10.1103/physrevlett.128.023201

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