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  • Influence of edge effects on laser-induced surface displacement of opaque materials by photothermal interferometry
    Flizikowski, Gabriel Antonio Siqueira ...
    We demonstrate the influence of edge effects on the photothermal-induced phase shift measured by a homodyne quadrature laser interferometer and compare the experiments with rigorous theoretical ... descriptions of thermoelastic surface displacement of metals. The finite geometry of the samples is crucial in determining how the temperature is distributed across the material and how this affects the interferometer phase shift measurements. The optical path change due to the surface thermoelastic deformation and thermal lens in the surrounding air is decoded from the interferometric signal using analytical and numerical tools. The boundary/edge effects are found to be relevant to properly describe the interferometric signals. The tools developed in this study provide a framework for the study of finite size effects in heat transport in opaque materials and are applicable to describe not only the phase shift sensed by the interferometer but also to contribute to the photothermal-based technologies employing similar detection mechanisms.
    Vir: Journal of applied physics. - ISSN 0021-8979 (Vol. 128, iss. 4, Jul. 2020, str. 1-10)
    Vrsta gradiva - članek, sestavni del
    Leto - 2020
    Jezik - angleški
    COBISS.SI-ID - 24363523

    Povezava(-e):

    https://aip.scitation.org/doi/10.1063/5.0015996
    Repozitorij Univerze v Ljubljani – RUL
    DOI

vir: Journal of applied physics. - ISSN 0021-8979 (Vol. 128, iss. 4, Jul. 2020, str. 1-10)
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