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Updated: Jul 7, 2026

Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics
Published on: August 5, 2020
Resonant generation of surface acoustic waves between moving and stationary piezoelectric crystals
Vladimir N Khudik1, Constantine E Theodosiou
1Department of Physics and Astronomy, University of Toledo, Toledo, Ohio 43606, USA. vkhudik@physics.utoledo.edu
Abstract:
The propagation of surface acoustic waves in a system composed of two piezoelectric crystals moving with respect to each other and separated by a vacuum gap is considered. The waves are localized on different sides of the gap and coupled only through the electrostatic interaction. It is shown that when the velocity of the relative motion of crystals is close to some value, there occurs a wave instability resulting in a resonant generation of these surface waves. The rate of growth of Bleustein-Gulyaev waves in piezoelectric crystals of 6mm symmetry class is determined analytically.
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