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Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

High-order harmonic generation processes in classical and quantum anharmonic oscillators

Author

  • P Balcou
  • Anne L'Huillier
  • D Escande

Summary, in English

We present a theoretical study of high-order harmonic generation by a slowly driven ''Duffing'' anharmonic oscillator. The power spectra are shown to display a plateau of high harmonics, which ends up with a sharp cutoff. The classical dynamics is analyzed with the adiabatic invariance theorem, which yields a simple interpretation to this characteristic behavior. We compare with the quantum case by solving numerically the time-dependent Schrodinger equation, and outline the similarity between classical damping and quantum-mechanical ionization processes. This allows us, in particular, to interpret the existence of intrinsic phases between high harmonics and the driving field. We further discuss the implication of these relaxation processes on the coherence of high harmonics, as well as the existence of interference processes yielding quasiresonant structures in intensity dependences.

Department/s

  • Atomic Physics

Publishing year

1996

Language

English

Pages

3456-3468

Publication/Series

Physical Review A (Atomic, Molecular and Optical Physics)

Volume

53

Issue

5

Document type

Journal article

Publisher

American Physical Society

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1050-2947