Computations of the Acoustic-Waves Propagation-Parameters and the Subsequent Elastic Constants Derivation in a Single Layer on a Substrate

• Autorzy: Błachowicz T. , Beghi M.
• Języki publikacji: EN

Abstrakty

EN

The aim of this article is to present a phenomenon of acoustic waves propagation in a single layer on a semi-infinite substrate from the classical theory of elasticity point of view, and recall the description of this phenomenon by G. W. Farnell and E. L. Adler issued in 1972. Additionally, the purpose is to provide tutorial-type, step-by-step scheme for the numerical algorithm, using matrix formalism, in order to calculate frequencies, velocities and polarizations of different acoustic modes propagating within a layer. It was shown how from these calculations elastic constants of materials can be derived from fittings into dependencies between velocities and acoustic wave-vectors. The approach presented is related to Brillouin light scattering (BLS) experiments. The BLS experiments provide information about acoustic modes frequencies, velocities and wave-vectors, thus supporting the fitting procedure by reduction number of the unknown parameters.

Słowa kluczowe

EN

elastic constants; thin layers; Sezawa and Rayleigh waves; Brillouin light scattering

• Wydawca: Silesian Division of Polish Acoustical Society
• Czasopismo: Molecular and Quantum Acoustics
• Rocznik: 2006
• Tom: Vol. 27
• Strony: 49--61
• Opis fizyczny: Bibliogr. 3 poz., rys.

Twórcy

autor

Błachowicz T.

autor

Beghi M.

• Department of Electron Technology, Institute of Physics, Silesian University of TechnologyKrzywoustego 2, 44-100 Gliwice, Poland

Bibliografia

• 1.Physical Acoustics- Principles and Methods, Vol. 9, W. P. Mason and R. N. Thurston, Eds., Chapter 2, by G. W. Farnell and E. L. Adler, Academic Press, New York and London 1972, pp. 35-127
• 2.T. Blachowicz, Brillouin spectroscopy in crystal lattices. Acoustic and spin waves, Seria Matematyka-Fizyka 90, Silesian University of Technology Press, Gliwice 2003, PL ISSN 0072-470X.*
• 3.M. G. Beghi, C. E. Bottani, and R. Pastorelli, High accuracy measurements of elastic constants of thin films by surface Brillouin scattering, Mechanical Properties of Structural Films, ASTM STP 1413, C. Muhlstein and S. B. Brown (Eds.), American Society for Testing and Materials, West Conshohocken PA 2001.