XUV-Assisted High-Order Harmonic Generation

ORAL

Abstract

We report on the high-order harmonics generation (HHG) by a near-infrared (NIR) laser pulse in the presence of an extreme ultraviolet (XUV) field. The experiments were performed using the free-electron laser (FEL) in Hamburg (FLASH), Germany. Previous theoretical studies predict an enhancement of the HHG yield when XUV and NIR fields are combined [1]. In our experiments, we were able to observe such an enhancement, albeit very small, in the HHG yield of argon and krypton at different XUV wavelengths. Furthermore, we observe a strong decrease in the HHG yield when the XUV pulse precedes the NIR. [1] C. Buth, M.C. Kohler, J. Ullrich, C.H. Keitel, Opt. Lett. \textbf{36}, 3530--3532 (2011)

*This project is supported by the DOE, Office of Science, BES, Division of Chemical, Geological, and Biological Sciences.

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Authors

  • Shashank Pathak

    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University

  • Jan Tross

    • J. R. Macdonald Lab., Kansas State University
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University

  • Adam Summers

    • J. R. Macdonald Lab., Kansas State University
    • Kansas State University
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University

  • Daniel Rolles

    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan KS, USA
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University
    • Kansas State University
    • J.R. Macdonald Laboratory, Kansas State University, Manhattan, KS 66506

  • Carlos Trallero

    • Department of Physics, University of Connecticut
    • University of Connecticut

  • Dimitrios Rompotis

    • Deutsches Elektronen-Synchrotron, Hamburg

  • Benjamin Erk

    • Deutsches Elektronen-Synchrotron, Hamburg

  • Christopher Passow

    • Deutsches Elektronen-Synchrotron, Hamburg

  • Bastian Manschwetus

    • Deutsches Elektronen-Synchrotron, Hamburg

  • Sadia Bari

    • Deutsches Elektronen-Synchrotron, Hamburg

  • Rebecca Boll

    • European XFEL, Hamburg

  • Patrik Grychtol

    • European XFEL, Hamburg