Reflection of a saw from periodic shallow grooves |
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| Institution: | 1. Department of Materials, Imperial College London, London SW7 2AZ, United Kingdom;2. Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, United Kingdom;3. Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan;1. Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China;2. Shenzhen Key Laboratory for Additive Manufacturing of High-performance materials, Southern University of Science and Technology, Shenzhen 518055, China |
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| Abstract: | Tiersten's perturbation boundary conditions are generalized to the case of a piezoelectric substrate with a sinusoidally corrugated surface. On the basis of these conditions the equations of coupled normal modes are derived, which in turn serve to calculate the coefficient of reflection of the surface acoustic wave from a single groove at an arbitrary angle of incidence of the wave. Both the mechanical and the electrical interactions are taken into account between the wave and the grooves having a free or metallized surface. The calculations indicate a considerable dependence of the coefficient of reflection of the wave upon the propagation directions of the incident and the reflected wave. |
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