Two-photon double ionization of neon using an intense attosecond pulse train
Abstract
We present the first demonstration of two-photon double ionization of neon using an intense extreme ultraviolet (XUV) attosecond pulse train (APT) in a photon energy regime where both direct and sequential mechanisms are allowed. For an APT generated through high-order harmonic generation (HHG) in argon we achieve a total pulse energy close to 1 J, a central energy of 35 eV and a total bandwidth of eV. The APT is focused by broadband optics in a neon gas target to an intensity of Wcm. By tuning the photon energy across the threshold for the sequential process the double ionization signal can be turned on and off, indicating that the two-photon double ionization predominantly occurs through a sequential process. The demonstrated performance opens up possibilities for future XUV-XUV pump-probe experiments with attosecond temporal resolution in a photon energy range where it is possible to unravel the dynamics behind direct vs. sequential double ionization and the associated electron correlation effects.
Keywords
Cite
@article{arxiv.1603.05439,
title = {Two-photon double ionization of neon using an intense attosecond pulse train},
author = {B. Manschwetus and L. Rading and F. Campi and S. Maclot and H. Coudert-Alteirac and J. Lahl and H. Wikmark and P. Rudawski and C. M. Heyl and B. Farkas and T. Mohamed and A. L'Huillier and P. Johnsson},
journal= {arXiv preprint arXiv:1603.05439},
year = {2016}
}