In order to make the photothermal effect detectable from a sample with low optical absorption, an optically opaque layer must be applied on its surface. A model of optically induced temperature variations for such a structure is derived, with a very thin coating applied on the non-illuminated (back) side of the sample and neglecting heat flux dissipation in the coating. Validation of the model is performed by comparing the obtained results with the results for the corresponding two-layer structure model. The influence of optical absorption on surface temperature variations of both optically transparent and semi-transparent film, whether the film is a good or poor thermal conductor, is analyzed. It is shown that the effects of optical absorption in the coated structure can be observed through variations in the measured temperature, despite the low absorbance of the sample.
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21 February 2023
Research Article|
February 15 2023
Photothermally induced temperature variations in a low-absorption sample via backside absorption
V. V. Miletic
;
V. V. Miletic
a)
(Conceptualization, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft)
1
Faculty of Philosophy, University of East Sarajevo
, 71420 Pale, Bosnia and Herzegovina
2
Faculty of Sciences and Mathematics, University of Niš
, Višegradska 33, P.O. Box 224, 18 000 Niš, Serbia
a)Author to whom correspondence should be addressed: vesna.miletic@ff.ues.rs.ba
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M. N. Popovic
;
M. N. Popovic
(Investigation, Methodology, Software, Validation)
3
Institute of Physics Belgrade, National Institute of the Republic of Serbia, University of Belgrade
, Pregrevica 118, 11080 Belgrade (Zemun), Serbia
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S. P. Galovic
;
S. P. Galovic
(Conceptualization, Formal analysis, Methodology, Supervision, Writing – review & editing)
4
“VINČA” Institute of Nuclear Sciences—National Institute of thе Republic of Serbia, University of Belgrade
, P.O. Box 522, 11000 Belgrade, Serbia
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D. D. Markushev
;
D. D. Markushev
(Formal analysis, Investigation, Validation)
3
Institute of Physics Belgrade, National Institute of the Republic of Serbia, University of Belgrade
, Pregrevica 118, 11080 Belgrade (Zemun), Serbia
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M. V. Nesic
M. V. Nesic
(Data curation, Formal analysis, Investigation, Software, Supervision, Visualization, Writing – review & editing)
4
“VINČA” Institute of Nuclear Sciences—National Institute of thе Republic of Serbia, University of Belgrade
, P.O. Box 522, 11000 Belgrade, Serbia
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a)Author to whom correspondence should be addressed: vesna.miletic@ff.ues.rs.ba
J. Appl. Phys. 133, 075101 (2023)
Article history
Received:
November 09 2022
Accepted:
January 24 2023
Citation
V. V. Miletic, M. N. Popovic, S. P. Galovic, D. D. Markushev, M. V. Nesic; Photothermally induced temperature variations in a low-absorption sample via backside absorption. J. Appl. Phys. 21 February 2023; 133 (7): 075101. https://doi.org/10.1063/5.0134313
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