Mechanisms and kinetics of short pulse laser-induced destruction of silver-containing nanoparticles in multicomponent silicate photo-thermo-refractive glass

    Authors

    J. Lumeau;L. B. Glebov

    Comments

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    Abbreviated Journal Title

    Appl. Optics

    Keywords

    PHOTOTHERMOREFRACTIVE GLASS; SIZE-REDUCTION; BRAGG GRATINGS; FRAGMENTATION; ABSORPTION; PARTICLES; INDEX; Optics

    Abstract

    Photo-thermo-refractive (PTR) glass is a photosensitive multi-component silicate glass that is commercially used for the recording of volume holographic elements and finds many applications in advanced laser systems. Refractive index decrement in this glass is observed after UV exposure followed by thermal development. This procedure also causes the appearance of Ag-containing particles that can then be optically bleached by using the second harmonic of a Nd:YAG laser. Despite the broad usage of this method, its mechanisms are still unclear. In this paper, a systematic study of the short pulse laser-induced destruction of Ag-containing particles' kinetics versus incident energy per pulse and dosage is presented. We show that no bleaching of Ag-containing particles occurs for an energy density in laser pulses below 0.1 J/cm(2) while above 1 J/cm(2), the efficiency of bleaching saturates. Efficiency of bleaching depends on the type of particles to be bleached (Ag, AgBr...). Using a simple model of short pulse laser interaction with nanoparticles embedded in glass, the temperature of the Ag-containing particles reached during the laser interaction is shown to be large enough to produce complete dissipation of these particles which is expected to be the main mechanism of short pulse laser-induced destruction of Ag-containing particles. (C) 2014 Optical Society of America

    Journal Title

    Applied Optics

    Volume

    53

    Issue/Number

    31

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    7362

    Last Page

    7368

    WOS Identifier

    WOS:000343919400039

    ISSN

    1559-128X

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