Resonance reflection of acoustic waves in piezoelectric bi-crystalline structures

The paper studies the bulk wave reflection from internal interfaces in piezoelectric media. The interfaces of two types have been considered. Infinitesimally thin metallic layer inserted into homogeneous piezoelectric crystal of arbitrary symmetry. Rigidly bonded crystals whose piezoelectric coeffic...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2005-05, Vol.52 (5), p.904-910
Main Authors: Darinskii, A.N., Weihnacht, M.
Format: Article
Language:English
Subjects:
Acoustic reflection
Acoustic waves
Acoustics
Anisotropic magnetoresistance
Bonding
Constants
Crystalline materials
Crystals
Electric potential
Exact solutions
Lithium niobates
Mathematical analysis
Piezoelectric materials
Piezoelectricity
Reflection
Resonance
Solid state circuits
Wave reflection
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Summary:The paper studies the bulk wave reflection from internal interfaces in piezoelectric media. The interfaces of two types have been considered. Infinitesimally thin metallic layer inserted into homogeneous piezoelectric crystal of arbitrary symmetry. Rigidly bonded crystals whose piezoelectric coefficients differ by sign but the other material constants are identical. Analytic expressions for the coefficients of mode conversion have been derived. An analysis has been carried out of specific singularities arising when the angle of incidence is such that the resonance excitation of leaky interface acoustic waves occurs. The conditions for the resonance total reflection have been established. The computations performed for lithium niobate (LiNbO/sub 3/) illustrate general conclusions.
ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2005.1503976