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  • Vol. 36, Iss. 17 — Sep. 1, 2011
  • pp: 3530–3532

High-order harmonic generation enhanced by XUV light

Christian Buth, Markus C. Kohler, Joachim Ullrich, and Christoph H. Keitel  »View Author Affiliations


Optics Letters, Vol. 36, Issue 17, pp. 3530-3532 (2011)
http://dx.doi.org/10.1364/OL.36.003530


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Abstract

The combination of high-order harmonic generation (HHG) with resonant XUV excitation of a core electron into the transient valence vacancy that is created in the course of the HHG process is investigated theoretically. In this setup, the first electron performs a HHG three-step process, whereas the second electron Rabi flops between the core and the valence vacancy. The modified HHG spectrum due to recombination with the valence and the core is determined and analyzed for krypton on the 3 d 4 p resonance in the ion. We assume an 800 nm laser with an intensity of about 10 14 W cm 2 and XUV radiation from the Free Electron Laser in Hamburg (FLASH) with an intensity in the range 10 13 10 16 W cm 2 . Our prediction opens perspectives for nonlinear XUV physics, attosecond x rays, and HHG-based spectroscopy involving core orbitals.

© 2011 Optical Society of America

OCIS Codes
(140.2600) Lasers and laser optics : Free-electron lasers (FELs)
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.7220) Nonlinear optics : Upconversion
(260.6048) Physical optics : Soft x-rays

ToC Category:
Nonlinear Optics

History
Original Manuscript: May 24, 2011
Revised Manuscript: July 28, 2011
Manuscript Accepted: August 3, 2011
Published: September 1, 2011

Citation
Christian Buth, Markus C. Kohler, Joachim Ullrich, and Christoph H. Keitel, "High-order harmonic generation enhanced by XUV light," Opt. Lett. 36, 3530-3532 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-17-3530


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