STP1028: Wavelength Dependence of Laser-Induced Sputtering from the (111) Surface of BaF2

    Reif, J
    Institut für Atom- und Festkörperphysik Freie Universität, Berlin, West Germany

    Fallgren, H
    Chalmers Institute of Technology, Göteborg,

    Cooke, WE
    University of Southern California, Los Angeles, CA

    Matthias, E
    Institut für Atom- und Festkörperphysik Freie Universität, Berlin, West Germany

    Pages: 12    Published: Jan 1988


    Abstract

    Using blue tunable pulse laser radiation of low fluence, we have investigated laser-induced sputtering from cleaved BaF2 (111) surfaces under ultrahigh vacuum conditions. Timecorrelated with the laser pulses we observed the positiveions Ba+, Ba++, (BaF)+, and F+. Practically no negative ions were found. Neutral atomic fluorine (F°) was desorbed abundantly. A pulse correlation of F° as well as the relative amount of F° and F+ could not be established at this stage. The emission yield of all positive ions as well as of F° was strongly wavelength dependent and showed a broad resonance around 2.9 eV.

    Keywords:

    laser-induced sputtering, ultrahigh vacuum, laser-induced desorption, fluoride optical materials


    Paper ID: STP18587S

    Committee/Subcommittee: F01.10

    DOI: 10.1520/STP18587S


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