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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 12 — Jun. 8, 2009
  • pp: 9891–9903

Harmonic generation beyond the Strong-Field Approximation: the physics behind the short-wave-infrared scaling laws

J. A. Pérez-Hernández, L. Roso, and L. Plaja  »View Author Affiliations


Optics Express, Vol. 17, Issue 12, pp. 9891-9903 (2009)
http://dx.doi.org/10.1364/OE.17.009891


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Abstract

The physics of laser-mater interactions beyond the perturbative limit configures the field of extreme non-linear optics. Although most experiments have been done in the near infrared (λ≤1µm), the situation is changing nowadays with the development of sources at longer wavelengths (<5µm), opening new perspectives in the synthesis of shorter XUV attosecond pulses and higher frequencies. The theory of intense-field interactions is based either on the exact numerical integration of the time-dependent Schrödinger equation or in the development of models, mostly based on the strong-field approximation. Recent studies in the short-wave infrared show a divergence between the predictions of these models and the exact results. In this paper we will show that this discrepancy reveals the incompleteness of our present understanding of high-order harmonic generation. We discuss the physical grounds, provide a theoretical framework beyond the standard approximations and develop a compact approach that accounts for the correct scaling of the harmonic yield.

© 2009 Optical Society of America

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(190.4160) Nonlinear optics : Multiharmonic generation
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(260.5210) Physical optics : Photoionization
(270.6620) Quantum optics : Strong-field processes
(020.2649) Atomic and molecular physics : Strong field laser physics

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: February 17, 2009
Revised Manuscript: April 2, 2009
Manuscript Accepted: April 2, 2009
Published: May 28, 2009

Citation
J. A. Pérez-Hernández, L. Roso, and L. Plaja, "Harmonic generation beyond the Strong-Field Approximation: the physics behind the short-wave-infrared scaling laws," Opt. Express 17, 9891-9903 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-12-9891


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