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Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

Time-resolved measurements of high order harmonics confined by polarization gating

Author

  • A Zair
  • O Tcherbakoff
  • E Mevel
  • E Constant
  • R Lopez-Martens
  • Johan Mauritsson
  • Per Johnsson
  • Anne L'Huillier

Summary, in English

We investigate the temporal confinement of high order harmonic pulses generated by a femtosecond (fs) infrared (IR) pulse with a time varying polarization. We use a set of two birefringent quartz plates to modulate the IR polarization. It produces a short temporal gate of linear polarization where harmonics are efficiently generated during a small fraction of the IR pulse. By rotating one of the plates, the gate width can be continuously varied between 70 fs down to 7 fs. The XUV pulse duration is measured by cross-correlation with a probe IR pulse of 12 fs. When the gate width is decreased, a clear temporal confinement of the XUV emission is observed through the cross correlation signal. This experiment is the first direct experimental evidence in the temporal domain that the polarization gating technique can be used to significantly shorten the harmonic pulse duration.

Department/s

  • Atomic Physics

Publishing year

2004

Language

English

Pages

869-872

Publication/Series

Applied Physics B

Volume

78

Issue

7-8

Document type

Journal article

Publisher

Springer

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0946-2171