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Laser induced thermoelastic surface displacement in solids detected simultaneously by photothermal mirror and interferometry
Flizikowski, G. A. S. (Author), Capeloto, O. A. (Author), Camargo, V. G. (Author), Anghinoni, B. (Author), Baesso, Mauro L. (Author), Malacarne, Luis Carlos (Author), Belançon, M. P. (Author), Požar, Tomaž (Author), Astrath, Nelson Guilherme Castelli (Author)

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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.

Language:English
Keywords:photothermal mirror, interferometry, thermal expansion
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2020
Number of pages:str. 7116-7124
Numbering:Vol. 28, no. 5
UDC:519.6:544.537(045)
ISSN on article:1094-4087
DOI:10.1364/OE.386344 Link is opened in a new window
COBISS.SI-ID:17053211 Link is opened in a new window
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Downloads:190
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Record is a part of a journal

Title:Optics express
Shortened title:Opt. express
Publisher:Optical Society of America
ISSN:1094-4087
COBISS.SI-ID:8636438 This link opens in a new window

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Funding Programme:Programska skupina
Project no.:P2-0392
Name:Optodinamika

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Funding Programme:Aplikativni raziskovali program
Project no.:L2-9254
Name:Prostorsko in časovno oblikovanje laserske svetlobe za minimalno invazivne oftalmološke posege

Secondary language

Language:Slovenian
Title:Lasersko povzročen termoelastični pomik površine v trdnih snoveh zaznan hkrati s fototermalnim zrcalom in interferometrijo
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.

Keywords:fototermalno zrcalo, interferometrija, termoelastična ekspanzija

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