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Updated: Jul 13, 2026

Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics
Published on: August 5, 2020
A0 mode interaction with a plate free edge: theory and experiments at very low frequency by thickness product
Guillemette Ribay1, Stefan Catheline, Dominique Clorennec
1Laboratoire Ondes et Acoustique, Université Denis Diderot, UMR CNRS 7587 ESPCI, Paris Cedex 05, France. guillemette.ribay@loa.espci.fr
Abstract:
When a plane acoustic wave reaches a medium with an impedance infinite or null, it experiences a phase shift of zero or pi and its amplitude on the edge is maximum or vanishes. The case of a flexion wave (A0 Lamb wave) at a free end is also simple; its amplitude is multiplied by a factor 2 square root 2 and the phase shift is pi/2. The evanescent wave at the origin of these phenomena, perfectly described by the classical flexural plate theory, is identified as the imaginary A1 mode of the exact Rayleigh-Lamb theory. The experiences confirm the theoretical predictions.
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