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)

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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