Generation and detection of thermoelastic waves in metals by a photothermal mirror method

O. A. Capeloto (Author), V. S. Zanuto (Author), G. V. B. Lukasievicz (Author), Luis Carlos Malacarne (Author), S. E. Bialkowski (Author), Tomaž Požar (Author), N. G. C. Astrath (Author)

Abstract

We investigate the thermoelastic waves launched by a localized heat deposition. Pulsed laser excitation is used to generate mechanical perturbations in metals that are detected using the photothermal mirror method. This method detects the wavefront distortion of the probe beam reflected from the perturbed sample surface. Nanometer scale expansion of the material is induced just under the irradiated surface releasing transient thermoelastic waves of much smaller amplitudes on the surface. Numerical predictions and the experimental results are in a good agreement and represent both the thermal diffusion of the large amplitude, long-lasting outward bulge, and the released elastic waves.

Keywords

elastic waves;photothermal effects;wavefront sensing;mirrors;elasticity;optodynamics;

Data

Language:	English
Year of publishing:	2016
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	535:531.3(045)
COBISS:	15057179
ISSN:	0003-6951
Views:	644
Downloads:	561
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	elastični valovi;fototermični pojavi;zaznavanje valovnih front;zrcala;elastičnost;optodinamika;
Type (COBISS):	Article
Embargo end date (OpenAIRE):	2017-11-09
Pages:	str. 1-4
Volume:	ǂVol. ǂ109
Issue:	ǂiss. ǂ19
Chronology:	Nov. 2016
DOI:	10.1063/1.4967530
ID:	10991296