Abstract
The authors present an explicit three-dimensional theoretical model of modulated photothermal deformation in solids which applies directly to the square-wave intensity modulation case. They also show the dependence of the signal amplitude on the modulation frequency and discuss the effects of the thermal diffusivity and the thickness of the solid sample, together with the pump-beam radius, on the frequency dependence. The experimental verification of the theoretical predictions shows that their theoretical model provides an accurately quantitative tool for the study of the thermophysical properties of materials.
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