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DOE OSTI · 1361688

Nonsequential double ionization with mid-infrared laser fields

Li, Ying -Bin·Wang, Xu·Yu, Ben -Hai·Tang, Qing -Bin·Wang, Guang -Hou·Wan, Jian -Guo
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Abstract

Using a full-dimensional Monte Carlo classical ensemble method, we present a theoretical study of atomic nonsequential double ionization (NSDI) with mid-infrared laser fields, and compare with results from near-infrared laser fields. Unlike single-electron strong-field processes, double ionization shows complex and unexpected interplays between the returning electron and its parent ion core. As a result of these interplays, NSDI for mid-IR fields is dominated by second-returning electron trajectories, instead of first-returning trajectories for near-IR fields. Here, some complex NSDI channels commonly happen with near-IR fields, such as the recollision-excitation-with-subsequent-ionization (RESI) channel, are virtually shut down by mid-IR fields. Besides, the final energies of the two electrons can be extremely unequal, leading to novel e-e momentum correlation spectra that can be measured experimentally.

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74 ATOMIC AND MOLECULAR PHYSICSatomic and molecular collision processesnonlinear optics

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Li, Ying -Bin, Wang, Xu, Yu, Ben -Hai, Tang, Qing -Bin, Wang, Guang -Hou, Wan, Jian -Guo. 2016-11-18. Nonsequential double ionization with mid-infrared laser fields. https://doi.org/10.1038/srep37413

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