G. A. S. Flizikowski (Author), O. A. Capeloto (Author), V. G. Camargo (Author), B. Anghinoni (Author), Mauro L. Baesso (Author), Luis Carlos Malacarne (Author), M. P. Belançon (Author), Tomaž Požar (Author), N. G. C. Astrath (Author)

Abstract

We propose a combined pump-probe optical method to investigate heat diffusion properties of solids. We demonstrate single-shot simultaneous laser-induced thermoelastic surface displacement of metals detected by concurrent measurements using photothermal mirror and interferometry. Both methods probe the surface displacement by analyzing the wavefront distortions of the probe beams reflected from the surface of the sample. Thermoelastic properties are retrieved by transient analysis in combination with numerical description of the thermoelastic displacement and temperature rise in the sample and in the surrounding air. This technique presents a capability for material characterization that can be extended to experiments for quantitative surface mapping.

Keywords

photothermal mirror;interferometry;thermal expansion;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 519.6:544.537(045)
COBISS: 17053211 Link will open in a new window
ISSN: 1094-4087
Views: 744
Downloads: 479
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Other data

Secondary language: Slovenian
Secondary title: Lasersko povzročen termoelastični pomik površine v trdnih snoveh zaznan hkrati s fototermalnim zrcalom in interferometrijo
Secondary abstract: Predlagamo združitev dveh optičnih metod za raziskavo toplotnih difuzijskih lastnosti trdnih snovi. Z uporabo fototermalnega zrcala in interferometrije lahko istočasno zaznamo lasersko induciran termoelastični pomik površine kovin. Obe metodi merita pomik površine preko analize spremembe valovne fronte sondirnega svetlobnega žarka odbitega s površine vzorca. Termoelastične lastnosti dobimo s primerjavo med meritvami in numeričnim opisom termoelastičnega pomika ter dviga temperature v vzorcu in v okoliškem zraku. To tehniko lahko uporabimo za karakterizacijo materialov in jo lahko nadgradimo za kvantitativno določanje reliefa površin.
Secondary keywords: fototermalno zrcalo;interferometrija;termoelastična ekspanzija;
Type (COBISS): Article
Pages: str. 7116-7124
Volume: ǂVol. ǂ28
Issue: ǂno. ǂ5
Chronology: Mar. 2020
DOI: 10.1364/OE.386344
ID: 11419577