"Resonance" phenomena in thermal diffusion processes in two-layer structures

Yu G. Gurevich, G. N. Logvinov, N. Muñoz Aguirre, L. Martínez Pérez

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    Abstract

    The dependence on the chopper frequency of the effective thermal diffusivity and effective thermal conductivity in photoacoustic experiments is discussed. The theoretical model of a two-layer structure at rear-surface illumination in the high frequency limit is considered. It is shown that the effective thermal diffusivity presents "resonance" while the effective thermal conductivity sharply changes its magnitude and sign. Such "resonant" behavior strongly depends on the surface thermal conductivities associated with the interface thermal contacts. © 2002 American Institute of Physics.
    Original languageAmerican English
    Pages (from-to)2898-2900
    Number of pages2607
    JournalApplied Physics Letters
    DOIs
    StatePublished - 22 Apr 2002

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