Heat transfer from a modulated laser incident on a multilayered thin film material is theoretically analyzed as a continuum system accounting for thermal contact resistance between the layers and anisotropy of thermal conductivity of the films. Formulations are obtained for the intensity-averaged deflection of a probe beam (PB) laser bounced on the surface as it passes through the thermally excited region of the gas. The PB formulations are the basis for nonintrusively measuring material properties. An algorithm is used to determine property values by matching measured and simulated PB deflections with selected properties as fitting parameters. Experiments are reported to provide data for validating the PB formulations for bulk standard reference and film/substrate materials. For the latter, a virtual film bonded to a substrate of the same material was used. Results show that predicted and measured PB deflections are in good agreement for thin films when the modulation frequency positions the thermal penetration depth inside the film. It is also shown that for increasing thermal contact resistance, anisotropy of thermal conductivity of the film materials, and modulated beam radius and frequency, the PB deflections are reduced through the effect of these variables on heat flow in the solid and gas.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Heat Transfer in Multilayered Thin Film Materials Applied to Photothermal Deflection Spectroscopy


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2021-09-21


    Format / Umfang :

    13 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Heat dissipation study of polymeric dye laser materials by using photothermal deflection spectroscopy [4419-133]

    Scaffardi, L. B. / Duchowicz, R. / Costela, A. et al. | British Library Conference Proceedings | 2001


    Laser Photothermal Deflection Applied to Local Trace Gas Detection: Respiration of Tomatoes

    De Vries, H. S. M. / Bijnen, F. G. C. / Voesenek, L. A. C. J. et al. | British Library Online Contents | 1995



    Determining the Thermal Conductivity of W/B4C Multilayer Structures Using Photothermal Deflection Spectroscopy

    Moorhead, Michael / Avedisian, C. Thomas / Kazimirov, Alexander | AIAA | 2010


    Luminescent properties of nitrogen doped gap semiconductor studied with photothermal deflection spectroscopy [2554-30]

    Dong, M. / Ding, Z. / Tong, L. et al. | British Library Conference Proceedings | 1995