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Nonsequential double ionization is theoretically investigated in the counter-rotating two-color [frequencies (ω1,ω2)] circularly polarized laser fields with classical ensemble approach. It is found that remarkable ionization enhancement is obtained by adjusting the relative electric field amplitude ratios (γE). The result indicates that there is a broader steerable range of γE to obtain higher ionization...
Nonsequential double ionization of Ar by a counter-rotating two-color circularly polarized laser field is theoretically investigated. At the combined intensity in the “knee” structure range, the double ionization occurs mainly through recollision induced excitation followed by subsequent ionization of Ar+∗. By tracing the history of the recollision trajectories, we explain how the relative intensity...
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