The contribution of the delayed ionization in strong-field nonsequential double ionization

The Journal of Chemical Physics
Yinbo ChenPeixiang Lu

Abstract

With the classical ensemble model, we have investigated the pulse-duration dependence of nonsequential double ionization (NSDI) over a wide range of laser intensity. The correlated electron momentum distributions are distinctly different for the few-cycle and multiple cycle pulses, which agree well with the previous experiments. Based on this agreement, we analyzed the underlying process for the pulse-duration dependence of the electron correlation by tracing the classical trajectories. Counterintuitively, our analysis shows that the recollision-induced excited states of NSDI could resist ionization in the strong laser field for a time much longer than one optical cycle even at very high intensities. For the multiple-cycle pulses, NSDI events with such a long time delay have significant contribution to the total NSDI yields, which is responsible for the pulse-duration dependence of the observed correlated patterns in the electron momentum distributions.

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Citations

Nov 10, 2017·The Journal of Chemical Physics·Ning LiPeixiang Lu
Jan 13, 2019·Physical Review Letters·G P KatsoulisA Emmanouilidou

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