Generation of Bright Isolated Attosecond Soft X-Ray Pulses Driven by Multi-Cycle Mid-Infrared Lasers

ORAL

Abstract

Advances in the understanding of macroscopic phase-matching of high harmonic generation (HHG) driven by mid-IR lasers have made it possible to generate bright, coherent, high harmonic x-ray beams in the UV to keV with attosecond or even zeptosecond bandwidths. We perform advanced theoretical analysis, corroborated with experimental results, to unveil the characteristics of HHG soft x-ray \textit{as} pulses. We show that when mid-IR lasers are used to drive HHG, the conditions for optimal soft x-ray generation naturally coincide with the generation of bright isolated \textit{as} pulses that are also shorter in duration if compressed. In addition, in contrast to \textit{as} pulse generation in the EUV, multi-cycle driving laser pulses are more suitable for generating bright isolated soft x-ray bursts.

*Supported by DOE Office of Basic Energy Sciences (AMOS program) by a EU Marie Curie Fellowship (No. 328334) and NSF (Awards No. PHY-1125844 and No. PHY-1068706).

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Authors

  • Carlos Hernandez-Garcia

    • JILA, University of Colorado at Boulder

  • Ming-Chang Chen

    • National Tsing Hua University, Taiwan

  • Pei-Chei Huang

    • National Tsing Hua University, Taiwan

  • Christopher Mancuso

    • JILA, University of Colorado at Boulder

  • Franklin Dollar

    • JILA, University of Colorado at Boulder

  • Benjamin Galloway

    • JILA, University of Colorado at Boulder

  • Dimitar Popmintchev

    • JILA, University of Colorado at Boulder

  • Tenio Popmintchev

    • JILA, University of Colorado at Boulder

  • Barry Walker

    • University of Delaware

  • Luis Plaja

    • GIOE, Universidad de Salamanca

  • Margaret Murnane

    • JILA and Department of Physics, University of Colorado at Boulder

  • Henry Kapteyn

    • JILA and Department of Physics, University of Colorado at Boulder

  • Agnieszka Jaron-Becker

    • JILA and Department of Physics, University of Colorado at Boulder

  • Andreas Becker

    • JILA and Department of Physics, University of Colorado at Boulder