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Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

Spatial and spectral properties of the high-order harmonic emission in argon for seeding applications

Author

  • Xinkui He
  • Miguel Miranda
  • Jörg Schwenke
  • Olivier Guilbaud
  • Thierry Ruchon
  • C. Heyl
  • Elisavet Georgiadou
  • Rafal Rakowski
  • Anders Persson
  • Mette Gaarde
  • Anne L'Huillier

Summary, in English

We characterize and control the harmonic emission in the spectral and spatial domains in order to define in which conditions the harmonic radiation can be a high-quality seed for soft x-ray and x-ray free-electron lasers. The length of the gas cell, where harmonics are generated, was optimized and the energy per pulse was determined in absolute value with a calibrated x-ray photodiode. The beam spatial profile was measured and, in some conditions, a very collimated beam with a half-angle divergence below 1 mrad could be obtained. We also show that increasing the intensity of the fundamental laser field leads to a considerable broadening of the bandwidth of the harmonic radiation, allowing us to cover a large spectral range. This effect is due to fundamental reshaping leading to an efficient phase matching of both short- and long-trajectory contributions.

Department/s

  • Atomic Physics
  • MAX IV Laboratory

Publishing year

2009

Language

English

Publication/Series

Physical Review A (Atomic, Molecular and Optical Physics)

Volume

79

Issue

6

Document type

Journal article

Publisher

American Physical Society

Topic

  • Natural Sciences
  • Atom and Molecular Physics and Optics
  • Physical Sciences

Keywords

  • atom-photon collisions
  • argon
  • laser beams
  • generation
  • optical phase matching
  • optical harmonic

Status

Published

ISBN/ISSN/Other

  • ISSN: 1050-2947