Laser-assisted collision effect on nonsequential double ionization of helium in a few-cycle laser pulse
Abstract
Nonsequential double ionization (NSDI) of helium in an intense few-cycle laser pulse is investigated by applying the three-dimensional semi-classical re-scattering method. It is found that the momentum distribution of He shows a single-double-single peak structure as the pulse intensity increases. According to the different mechanisms dominating the NSDI process, the laser intensity can be classified into three regimes where the momentum distribution of He exhibits different characteristics. In the relatively high intensity regime, an NSDI mechanism named the "laser-assisted collision ionization" is found to be dominating the NSDI process and causing the single peak structure. This result can shed light on the study of non-sequential ionization of a highly charged ion in a relatively intense laser pulse.
Keywords
Cite
@article{arxiv.0901.2607,
title = {Laser-assisted collision effect on nonsequential double ionization of helium in a few-cycle laser pulse},
author = {Hongyun Li and J. Chen and Hongbing Jiang and Jie Liu and Panming Fu and Qihuang Gong and Zong-Chao Yan and Bingbing Wang},
journal= {arXiv preprint arXiv:0901.2607},
year = {2015}
}