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Proceedings Paper

Thermal characterization of nonhomogeneous materials by photothermal radiometry
Author(s): Mario Bertolotti; Roberto Li Voti; G. L. Liakhou; Stefano Paoloni; Concita Sibilia
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Paper Abstract

Although the mechanism of heat transport is a typical diffusion process, in cases in which the heat source is of a sinusoidal type, it may be found convenient to transform the Fourier diffusion equation in a formal Helmolz equation, speaking of thermal waves. In the present paper we will use this formalism for handling data from a photothermal measurement to retrieve the profile of thermal diffusivity under the surface of a solid material, showing that the surface temperature field obtained by the photothermal method can be connected to the thermal properties of the material in a simple and elegant way by using the concept of thermal waves scattering by the small thermal inhomogeneities of the material.

Paper Details

Date Published: 29 December 1999
PDF: 6 pages
Proc. SPIE 4016, Photonics, Devices, and Systems, (29 December 1999); doi: 10.1117/12.373683
Show Author Affiliations
Mario Bertolotti, INFM and Univ. di Roma La Sapienza (Italy)
Roberto Li Voti, INFM and Univ. di Roma La Sapienza (Italy)
G. L. Liakhou, Technical Univ. of Moldova (Moldova)
Stefano Paoloni, INFM and Univ. di Roma La Sapienza (Italy)
Concita Sibilia, INFM and Univ. di Roma La Sapienza (Italy)

Published in SPIE Proceedings Vol. 4016:
Photonics, Devices, and Systems
Miroslav Hrabovsky; Pavel Tomanek; Miroslav Miler, Editor(s)

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