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Full-Text Articles in Life Sciences
Influence Of Edge Effects On Laser-Induced Surface Displacement Of Opaque Materials By Photothermal Interferometry, G. A. S. Flizikowski, B. Anghinoni, J. H. Rohling, M. P. Belançon, R. S. Mendes, M. L. Baesso, L. C. Malacarne, T. Požar, Stephen E. Bialkowski, N. G. C. Astrath
Influence Of Edge Effects On Laser-Induced Surface Displacement Of Opaque Materials By Photothermal Interferometry, G. A. S. Flizikowski, B. Anghinoni, J. H. Rohling, M. P. Belançon, R. S. Mendes, M. L. Baesso, L. C. Malacarne, T. Požar, Stephen E. Bialkowski, N. G. C. Astrath
Chemistry and Biochemistry Faculty Publications
We demonstrate the influence of edge effects on the photothermal-induced phase shift measured by a homodyne quadrature laser interferometer and compare the experiments with rigorous theoretical descriptions of thermoelastic surface displacement of metals. The finite geometry of the samples is crucial in determining how the temperature is distributed across the material and how this affects the interferometer phase shift measurements. The optical path change due to the surface thermoelastic deformation and thermal lens in the surrounding air is decoded from the interferometric signal using analytical and numerical tools. The boundary/edge effects are found to be relevant to properly describe the …