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Angular dependence of the Wigner time delay upon tunnel ionization of H2

Author

Listed:
  • D. Trabert

    (Goethe-Universität Frankfurt am Main)

  • S. Brennecke

    (Leibniz Universität Hannover)

  • K. Fehre

    (Goethe-Universität Frankfurt am Main)

  • N. Anders

    (Goethe-Universität Frankfurt am Main)

  • A. Geyer

    (Goethe-Universität Frankfurt am Main)

  • S. Grundmann

    (Goethe-Universität Frankfurt am Main)

  • M. S. Schöffler

    (Goethe-Universität Frankfurt am Main)

  • L. Ph. H. Schmidt

    (Goethe-Universität Frankfurt am Main)

  • T. Jahnke

    (Goethe-Universität Frankfurt am Main)

  • R. Dörner

    (Goethe-Universität Frankfurt am Main)

  • M. Kunitski

    (Goethe-Universität Frankfurt am Main)

  • S. Eckart

    (Goethe-Universität Frankfurt am Main)

Abstract

When a very strong light field is applied to a molecule an electron can be ejected by tunneling. In order to quantify the time-resolved dynamics of this ionization process, the concept of the Wigner time delay can be used. The properties of this process can depend on the tunneling direction relative to the molecular axis. Here, we show experimental and theoretical data on the Wigner time delay for tunnel ionization of H2 molecules and demonstrate its dependence on the emission direction of the electron with respect to the molecular axis. We find, that the observed changes in the Wigner time delay can be quantitatively explained by elongated/shortened travel paths of the emitted electrons, which occur due to spatial shifts of the electrons’ birth positions after tunneling. Our work provides therefore an intuitive perspective towards the Wigner time delay in strong-field ionization.

Suggested Citation

  • D. Trabert & S. Brennecke & K. Fehre & N. Anders & A. Geyer & S. Grundmann & M. S. Schöffler & L. Ph. H. Schmidt & T. Jahnke & R. Dörner & M. Kunitski & S. Eckart, 2021. "Angular dependence of the Wigner time delay upon tunnel ionization of H2," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21845-6
    DOI: 10.1038/s41467-021-21845-6
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    Cited by:

    1. Wenyu Jiang & Luke Roantree & Lulu Han & Jiabao Ji & Yidan Xu & Zitan Zuo & Hans Jakob Wörner & Kiyoshi Ueda & Andrew C. Brown & Hugo W. Hart & Xiaochun Gong & Jian Wu, 2025. "Heterodyne analysis of high-order partial waves in attosecond photoionization of helium," Nature Communications, Nature, vol. 16(1), pages 1-8, December.

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