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Buth C, Kohler MC, Ullrich J, et al. High-order harmonic generation enhanced by XUV light. Opt Lett. 2011;36(17):3530-2doi: 10.1364/OL.36.003530.
Buth, C., Kohler, M. C., Ullrich, J., & Keitel, C. H. (2011). High-order harmonic generation enhanced by XUV light. Optics letters, 36(17), 3530-2. https://doi.org/10.1364/OL.36.003530
Buth, Christian, et al. "High-order harmonic generation enhanced by XUV light." Optics letters vol. 36,17 (2011): 3530-2. doi: https://doi.org/10.1364/OL.36.003530
Buth C, Kohler MC, Ullrich J, Keitel CH. High-order harmonic generation enhanced by XUV light. Opt Lett. 2011 Sep 01;36(17):3530-2. doi: 10.1364/OL.36.003530. PMID: 21886267.
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Opt Lett. 2011 Sep 01;36(17):3530-2. doi: 10.1364/OL.36.003530.

High-order harmonic generation enhanced by XUV light.

Optics letters

Christian Buth, Markus C Kohler, Joachim Ullrich, Christoph H Keitel

Affiliations

  1. Max-Planck-Institut für Kernphysik, Heidelberg, Germany. [email protected]

PMID: 21886267 DOI: 10.1364/OL.36.003530

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 3d→4p resonance in the ion. We assume an 800 nm laser with an intensity of about 10(14) W/cm2 and XUV radiation from the Free Electron Laser in Hamburg (FLASH) with an intensity in the range 10(13)-10(16)W cm2. Our prediction opens perspectives for nonlinear XUV physics, attosecond x rays, and HHG-based spectroscopy involving core orbitals.

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