DocumentCode :
337972
Title :
Grazing-angle scattering of surface acoustic waves in periodic groove arrays
Author :
Gramotnev, D.K.
Author_Institution :
Centre for Med. & Health Phys., Queensland Univ. of Technol., Brisbane, Qld., Australia
Volume :
1
fYear :
1998
fDate :
1998
Firstpage :
199
Abstract :
A new powerful method for analysis of extremely asymmetrical scattering (EAS) in periodic arrays is extended to the case of scattering that is intermediate between EAS and the conventional Bragg scattering. It was called grazing-angle scattering (GAS), because it takes place when the scattered wave propagates at a small (grazing) angle with respect to boundaries of a strip-like periodic array. It is demonstrated that the diffractional divergence of the scattered wave plays a crucial role in the steady-state GAS. Strong resonant character of GAS and its unique features, which make it radically different from the conventional Bragg scattering and EAS, are analyzed theoretically for surface Rayleigh waves in periodic groove arrays. In particular, it is shown that the resonant increase of the scattered wave amplitude during GAS can be even stronger than for EAS
Keywords :
Rayleigh waves; acoustic arrays; acoustic wave scattering; periodic structures; surface acoustic waves; Bragg scattering; Rayleigh wave; diffractional divergence; extremely asymmetrical scattering; grazing angle scattering; periodic groove array; resonance; surface acoustic wave; Acoustic arrays; Acoustic scattering; Acoustic waves; Diffraction; Optical scattering; Optical surface waves; Rayleigh scattering; Resonance; Surface acoustic waves; X-ray scattering;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
ISSN :
1051-0117
Print_ISBN :
0-7803-4095-7
Type :
conf
DOI :
10.1109/ULTSYM.1998.762128
Filename :
762128
Link To Document :
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