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arXiv · 1702.04232

Non-sequential double ionization with near-single cycle laser pulses

A. Chen·M. Kübel·B. Bergues·M. F. Kling·A. Emmanouilidou
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Abstract

A three-dimensional semiclassical model is used to study double ionization of Ar when driven by a near-infrared and near-single-cycle laser pulse for intensities ranging from 0.85$\times$10$^{14}$ W/cm$^{2}$ to 5$\times$10$^{14}$ W/cm$^{2}$. Asymmetry parameters, distributions of the sum of the two electron momentum components along the direction of the polarization of the laser field and correlated momenta are computed as a function of intensity and of the carrier envelope phase. A very good agreement is found with recently obtained results in kinematically complete experiments employing near-single-cycle laser pulses. Moreover, the contribution of the direct and delayed pathways of double ionization is investigated for the above observables. Finally, an experimentally obtained anti-correlation momentum pattern at higher intensities is reproduced with the three-dimensional semiclassical model and shown to be due to a transition from strong to soft recollisions with increasing intensity.

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A. Chen, M. Kübel, B. Bergues, M. F. Kling, A. Emmanouilidou. 2017-02-14. Non-sequential double ionization with near-single cycle laser pulses. https://arxiv.org/abs/1702.04232

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