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首页> 外文期刊>Physica status solidi, B. Basic research >Effective thermal conductivity: application to photothermal experiments for the case of bulk light absorption
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Effective thermal conductivity: application to photothermal experiments for the case of bulk light absorption

机译:有效的热导率:在吸收大量光的情况下应用于光热实验

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摘要

We suggest a new theoretical approach to obtain effective thermal parameters of two-layer structures in photothermal experiments, and calculate the effective thermal conductivity in the quasistatic approximation. Unlike previous works devoted to this problem, it is supposed that a non-equilibrium temperature originates due to the bulk modulated light absorption. It is shown that in this case the effective thermal parameters have to be obtained together with the effective optical parameters. As a result, the effective thermal parameters in the general case are dependent on the optical parameters of the layers. The role of the thermal properties of the interface between the layers is discussed. It is concluded that the effective parameters are not single-valued. They depend on the manner of measurements and the point of these measurements. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
机译:我们提出了一种新的理论方法来在光热实验中获得两层结构的有效热参数,并在准静态逼近中计算有效热导率。与以前致力于该问题的工作不同,人们认为是由于整体调制的光吸收而产生了不平衡温度。结果表明,在这种情况下,必须与有效的光学参数一起获得有效的热参数。结果,通常情况下的有效热参数取决于层的光学参数。讨论了层之间界面的热性能的作用。结论是有效参数不是单值的。它们取决于测量方式和这些测量点。 (C)2004 WILEY-VCH Verlag GmbH&Co. KGaA,Weinheim。

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