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

Capeloto, Otávio Augusto (author), Zanuto, V. S. (author), Lukasievicz, G. V. B. (author), Malacarne, L. C. (author), Bialkowski, Stephen Edward (author), Požar, Tomaž (author), Astrath, Nelson Guilherme Castelli (author)

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.

• Language: English
• Keywords: elastic waves, photothermal effects, wavefront sensing, mirrors, elasticity, optodynamics
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2016
• Number of pages: Str. 1-4
• Numbering: Vol. 109, iss. 19
• PID: 20.500.12556/RUL-105553
• UDC: 535:531.3(045)
• ISSN on article: 0003-6951
• DOI: 10.1063/1.4967530
• COBISS.SI-ID: 15057179
• Publication date in RUL: 05.12.2018

Record is a part of a journal

• Title: Applied physics letters
• Shortened title: Appl. phys. lett.
• Publisher: American Institute of Physics
• ISSN: 0003-6951
• COBISS.SI-ID: 24984832

Secondary language

• Language: Slovenian
• Keywords: elastični valovi, fototermični pojavi, zaznavanje valovnih front, zrcala, elastičnost, optodinamika

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0392
• Name: Optodinamika