STONELEY WAVE EXCITATION BY A BOUNDED BEAM AT THE DOWN-STEP OF A THIN-LAYER ON A SUBSTRATE

Authors
BRIERS R LEROY O SHKERDIN G
Citation
R. Briers et al., STONELEY WAVE EXCITATION BY A BOUNDED BEAM AT THE DOWN-STEP OF A THIN-LAYER ON A SUBSTRATE, The Journal of the Acoustical Society of America, 102(4), 1997, pp. 2108-2112
Citations number
9
Categorie Soggetti
Acoustics
Journal title
The Journal of the Acoustical Society of America → ACNP
ISSN journal
00014966
Volume
102
Issue
4
Year of publication
1997
Pages
2108 - 2112
Database
ISI
SICI code
0001-4966(1997)102:4<2108:SWEBAB>2.0.ZU;2-1
Abstract
The mode conversion of a bulk wave into a Stoneley wave at the downwar d step of a thin layer partially covering a solid substrate is studied . An analytical expression for the amplitude of the excited Stoneley w ave is derived by applying mode theory. The excitation amplitude has t wo pronounced maxima: at grazing and at Rayleigh angle incidence of th e bulk wave. The latter maximum is almost independent of the material characteristics of the thin layer. (C) 1997 Acoustical Society of Amer ica. [S0001-4966(97)06209-7] PACS numbers: 43.35.Pt [HEB].