Molecular Dissociative Ionization and Wave-Packet Dynamics Studied Using Two-Color XUV and IR Pump-Probe Spectroscopy

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We present a combined theoretical and experimental study of ultrafast wave-packet dynamics in the dissociative ionization of H-2 molecules as a result of irradiation with an extreme-ultraviolet (XUV) pulse followed by an infrared (IR) pulse. In experiments where the duration of both the XUV and IR pulses are shorter than the vibrational period of H-2+, dephasing and rephasing of the vibrational wave packet that is formed in H-2+ upon ionization of the neutral molecule by the XUV pulse is observed. In experiments where the duration of the IR pulse exceeds the vibrational period of H-2+ (15 fs), a pronounced dependence of the H+ kinetic energy distribution on XUV-IR delay is observed that can be explained in terms of the adiabatic propagation of the H-2+ wave packet on field-dressed potential energy curves.


  • F. Kelkensberg
  • C. Lefebvre
  • W. Siu
  • O. Ghafur
  • T. T. Nguyen-Dang
  • O. Atabek
  • A. Keller
  • V. Serov
  • Per Johnsson
  • Marko Swoboda
  • Thomas Remetter
  • Anne L'Huillier
  • S. Zherebtsov
  • G. Sansone
  • E. Benedetti
  • F. Ferrari
  • M. Nisoli
  • F. Lepine
  • M. F. Kling
  • M. J. J. Vrakking
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
Original languageEnglish
JournalPhysical Review Letters
Issue number12
Publication statusPublished - 2009
Publication categoryResearch

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