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Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

Time-frequency representation of autoionization dynamics in helium

Author

  • D. Busto
  • L. Barreau
  • M. Isinger
  • M. Turconi
  • C. Alexandridi
  • A. Harth
  • S. Zhong
  • R. J. Squibb
  • D. Kroon
  • S. Plogmaker
  • M. Miranda
  • Jiménez-Galán
  • L. Argenti
  • C. L. Arnold
  • R. Feifel
  • F. Martín
  • M. Gisselbrecht
  • A. L'Huillier
  • P. Salières

Summary, in English

Autoionization, which results from the interference between direct photoionization and photoexcitation to a discrete state decaying to the continuum by configuration interaction, is a well known example of the important role of electron correlation in light-matter interaction. Information on this process can be obtained by studying the spectral, or equivalently, temporal complex amplitude of the ionized electron wave packet. Using an energy-resolved interferometric technique, we measure the spectral amplitude and phase of autoionized wave packets emitted via the sp2+ and sp3+ resonances in helium. These measurements allow us to reconstruct the corresponding temporal profiles by Fourier transform. In addition, applying various time-frequency representations, we observe the build-up of the wave packets in the continuum, monitor the instantaneous frequencies emitted at any time and disentangle the dynamics of the direct and resonant ionization channels.

Department/s

  • Atomic Physics
  • MAX IV Laboratory
  • Synchrotron Radiation Research

Publishing year

2018-01-23

Language

English

Publication/Series

Journal of Physics B: Atomic, Molecular and Optical Physics

Volume

51

Issue

4

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • attosecond pulse
  • autoionization
  • Fano resonance
  • RABBIT
  • time-frequency representations
  • Wigner

Status

Published

ISBN/ISSN/Other

  • ISSN: 0953-4075