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Cold ablation driven by localized forces in alkali halides

Author

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  • Masaki Hada

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging
    Present address: Materials & Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan and JST-PRESTO, Kawaguchi 332-0012, Japan)

  • Dongfang Zhang

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging)

  • Kostyantyn Pichugin

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging
    Present address: Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1)

  • Julian Hirscht

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging)

  • Michał A. Kochman

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging
    School of Chemistry, University of Edinburgh)

  • Stuart A. Hayes

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging)

  • Stephanie Manz

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging)

  • Regis Y.N. Gengler

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging)

  • Derek A. Wann

    (School of Chemistry, University of Edinburgh
    Present address: Department of Chemistry, University of York, Heslington, York YO10 5DD, UK)

  • Toshio Seki

    (Quantum Science and Engineering Center, Kyoto University)

  • Gustavo Moriena

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging
    University of Toronto)

  • Carole A. Morrison

    (School of Chemistry, University of Edinburgh)

  • Jiro Matsuo

    (Quantum Science and Engineering Center, Kyoto University)

  • Germán Sciaini

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging
    Present address: Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1)

  • R.J. Dwayne Miller

    (The Max Planck Institute for the Structure and Dynamics of Matter, and The Hamburg Centre for Ultrafast Imaging
    University of Toronto)

Abstract

Laser ablation has been widely used for a variety of applications. Since the mechanisms for ablation are strongly dependent on the photoexcitation level, so called cold material processing has relied on the use of high-peak-power laser fluences for which nonthermal processes become dominant; often reaching the universal threshold for plasma formation of ~1 J cm−2 in most solids. Here we show single-shot time-resolved femtosecond electron diffraction, femtosecond optical reflectivity and ion detection experiments to study the evolution of the ablation process that follows femtosecond 400 nm laser excitation in crystalline sodium chloride, caesium iodide and potassium iodide. The phenomenon in this class of materials occurs well below the threshold for plasma formation and even below the melting point. The results reveal fast electronic and localized structural changes that lead to the ejection of particulates and the formation of micron-deep craters, reflecting the very nature of the strong repulsive forces at play.

Suggested Citation

  • Masaki Hada & Dongfang Zhang & Kostyantyn Pichugin & Julian Hirscht & Michał A. Kochman & Stuart A. Hayes & Stephanie Manz & Regis Y.N. Gengler & Derek A. Wann & Toshio Seki & Gustavo Moriena & Carole, 2014. "Cold ablation driven by localized forces in alkali halides," Nature Communications, Nature, vol. 5(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4863
    DOI: 10.1038/ncomms4863
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