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Title: Attosecond Electron Wave Packet Dynamics in Strong Laser Fields

We use a train of sub-200 attosecond extreme ultraviolet (XUV) pulses with energies just above the ionization threshold in argon to create a train of temporally localized electron wave packets. We study the energy transfer from a strong infrared (IR) laser field to the ionized electrons as a function of the delay between the XUV and IR fields. When the wave packets are born at the zero crossings of the IR field, a significant amount of energy ({approx}20 eV) is transferred from the field to the electrons. This results in dramatically enhanced above-threshold ionization in conditions where the IR field alone does not induce any significant ionization. Because both the energy and duration of the wave packets can be varied independently of the IR laser, they are valuable tools for studying and controlling strong-field processes.
Authors:
; ; ;  [1] ; ; ;  [2] ;  [3] ; ; ;  [4] ; ; ;  [5]
  1. Department of Physics, Lund Institute of Technology, P.O. Box 118, SE-221 00 Lund (Sweden)
  2. Laboratoire d'Optique Appliquee, Ecole Nationale Superieure des Techniques Avancees (ENSTA) - Ecole Polytechnique CNRS UMR 7639, 91761 Palaiseau Cedex (France)
  3. Laboratoire d'Interaction du rayonnement X Avec la Matiere, Universite Paris-Sud, 91405 Orsay (France)
  4. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001 (United States)
  5. CEA/DSM/DRECAM/SPAM, Ba circumflex t. 522, Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette (France)
Publication Date:
OSTI Identifier:
20696424
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 95; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevLett.95.013001; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ARGON; ELECTRONS; ENERGY TRANSFER; EV RANGE 10-100; EXTREME ULTRAVIOLET RADIATION; LASER RADIATION; LASERS; PHOTOIONIZATION; PHOTON-ATOM COLLISIONS; PULSES; WAVE PACKETS