LASER-INDUCED SURFACE ACOUSTIC WAVES FOR THIN FILM CHARACTERIZATION
Knowledge of mechanical properties of thin films is essential for most of their applications. However, their determination can be problematic for very thin films. LAW (Laser-induced acoustic waves) is a combined acousto-optic method capable of measuring films with thickness from few nanometers. It u...
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Czech Technical University in Prague
2020-06-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/6686 |
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| author | Radim Kudělka Lukáš Václavek Jan Tomáštík Sabina Malecová Radim Čtvrtlík |
| author_facet | Radim Kudělka Lukáš Václavek Jan Tomáštík Sabina Malecová Radim Čtvrtlík |
| author_sort | Radim Kudělka |
| collection | DOAJ |
| description | Knowledge of mechanical properties of thin films is essential for most of their applications. However, their determination can be problematic for very thin films. LAW (Laser-induced acoustic waves) is a combined acousto-optic method capable of measuring films with thickness from few nanometers. It utilizes ultrasound surface waves which are excited via short laser pulses and detected by a PVDF foil. Properties such as Young’s modulus, Poisson’s ratio and density of both the film and the substrate as well as film thickness can be explored.Results from the LAW method are successfully compared with nanoindentation for Young’s modulus evaluation and with optical method for film thickness evaluation and also with literature data. Application of LAW for anisotropy mapping of materials with cubic crystallographic lattice is also demonstrated. |
| format | Article |
| id | doaj-art-28a879ba4f124de78bbffd7a15ea9d4a |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2020-06-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-28a879ba4f124de78bbffd7a15ea9d4a2025-08-20T03:33:20ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822020-06-01270576110.14311/APP.2020.27.00575216LASER-INDUCED SURFACE ACOUSTIC WAVES FOR THIN FILM CHARACTERIZATIONRadim Kudělka0Lukáš Václavek1Jan Tomáštík2Sabina Malecová3Radim Čtvrtlík4Joint Laboratory of Optics, Palacky University Olomouc, 17. Listopadu 50a, 772 07, Olomouc, Czech RepublicJoint Laboratory of Optics, Palacky University Olomouc, 17. Listopadu 50a, 772 07, Olomouc, Czech RepublicInstitute of Physics of the Czech Academy of Sciences, Joint Laboratory of Optics of Palacky University and Institute of Physics AS CR, 17. Listopadu 12, CZ-771 46, Olomouc, Czech RepublicJoint Laboratory of Optics, Palacky University Olomouc, 17. Listopadu 50a, 772 07, Olomouc, Czech RepublicRegional Centre of Advanced Technologies and Materials, Joint Laboratory of Optics of Palacky University and Institute of Physics of the Czech Academy of Sciences, Faculty of Science, Palacky University, 17. Listopadu 12, 77146 Olomouc, Czech RepublicKnowledge of mechanical properties of thin films is essential for most of their applications. However, their determination can be problematic for very thin films. LAW (Laser-induced acoustic waves) is a combined acousto-optic method capable of measuring films with thickness from few nanometers. It utilizes ultrasound surface waves which are excited via short laser pulses and detected by a PVDF foil. Properties such as Young’s modulus, Poisson’s ratio and density of both the film and the substrate as well as film thickness can be explored.Results from the LAW method are successfully compared with nanoindentation for Young’s modulus evaluation and with optical method for film thickness evaluation and also with literature data. Application of LAW for anisotropy mapping of materials with cubic crystallographic lattice is also demonstrated.https://ojs.cvut.cz/ojs/index.php/APP/article/view/6686anisotropy, laser-induced surface acoustic waves, nanoindentation, thin films, young’s modulus |
| spellingShingle | Radim Kudělka Lukáš Václavek Jan Tomáštík Sabina Malecová Radim Čtvrtlík LASER-INDUCED SURFACE ACOUSTIC WAVES FOR THIN FILM CHARACTERIZATION Acta Polytechnica CTU Proceedings anisotropy, laser-induced surface acoustic waves, nanoindentation, thin films, young’s modulus |
| title | LASER-INDUCED SURFACE ACOUSTIC WAVES FOR THIN FILM CHARACTERIZATION |
| title_full | LASER-INDUCED SURFACE ACOUSTIC WAVES FOR THIN FILM CHARACTERIZATION |
| title_fullStr | LASER-INDUCED SURFACE ACOUSTIC WAVES FOR THIN FILM CHARACTERIZATION |
| title_full_unstemmed | LASER-INDUCED SURFACE ACOUSTIC WAVES FOR THIN FILM CHARACTERIZATION |
| title_short | LASER-INDUCED SURFACE ACOUSTIC WAVES FOR THIN FILM CHARACTERIZATION |
| title_sort | laser induced surface acoustic waves for thin film characterization |
| topic | anisotropy, laser-induced surface acoustic waves, nanoindentation, thin films, young’s modulus |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/6686 |
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