• Open Access

Numerical investigation of the sequential-double-ionization dynamics of helium in different few-cycle-laser-field shapes

Philipp Wustelt, Max Möller, Markus S. Schöffler, Xinhua Xie (谢新华), Vaclav Hanus, A. Max Sayler, Andrius Baltuska, Gerhard G. Paulus, and Markus Kitzler
Phys. Rev. A 95, 023411 – Published 14 February 2017

Abstract

We investigate sequential double ionization of helium by intense near-circularly polarized few-cycle laser pulses using a semiclassical ionization model with two independent electrons. Simulated He2+ ion momentum distributions are compared to those obtained in recent benchmark experiments [M. S. Schöffler, X. Xie, P. Wustelt, M. Möller, S. Roither, D. Kartashov, A. M. Sayler, A. Baltuska, G. G. Paulus, and M. Kitzler, Phys. Rev. A 93, 063421 (2016)]. We study the influence of a number of pulse parameters such as peak intensity, carrier-envelope phase, pulse duration, and second- and third-order spectral phase on the shape of the ion momentum distributions. Good agreement is found in the main features of these distributions and of their dependence on the laser pulse duration, peak intensity, and carrier-envelope phase. Furthermore, we find that for explaining certain fine-scale features observed in the experiments, it becomes important to consider subtle timing variations in the two-electron emissions introduced by small values of chirp. This result highlights the possibility of measuring and controlling multielectron dynamics on the attosecond time scale by fine tuning the field evolution of intense close-to-single-cycle laser pulses.

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  • Received 1 November 2016

DOI:https://doi.org/10.1103/PhysRevA.95.023411

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
  1. Techniques
Atomic, Molecular & Optical

Authors & Affiliations

Philipp Wustelt1,2,*, Max Möller1,2, Markus S. Schöffler3, Xinhua Xie (谢新华)3, Vaclav Hanus3, A. Max Sayler1,2, Andrius Baltuska3, Gerhard G. Paulus1,2, and Markus Kitzler3,†

  • 1Institute of Optics and Quantum Electronics, Friedrich-Schiller-University Jena, D-07743 Jena, Germany
  • 2Helmholtz Institute Jena, D-07743 Jena, Germany
  • 3Photonics Institute, Technische Universität Wien, Vienna, Austria

  • *philipp.wustelt@uni-jena.de
  • markus.kitzler@tuwien.ac.at

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Issue

Vol. 95, Iss. 2 — February 2017

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