Phototermal Spectra of Inhomogeneous Coatings |
| M. Popovic, S. Galovic, and Z. Stojanovic
"Vinca" Institute of Nuclear Sciences, Belgrade, Serbia |
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| In this paper we demonstrate a theoretical study for photothermal measurements on inhomogeneous coatings. First, a general photothermal mathematical model for thermal gradient materials is presented. Then, we discuss the effects of inhomogeneous thermal properties in photothermal amplitude and phase spectra of coatings. Finally, a method for quantitative depth profiling that makes use of prior knowledge about the type of profile existing in a sample to reduce the instabilities associated with the mathematically ill conditioned task is demonstrated. |
| DOI: 10.12693/APhysPolA.116.535 PACS numbers: 42.62.Eh, 44.05.+e, 44.10.+i, 68.60.Dv |