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Proceedings Paper

Determination of the transport properties of ultrasonic waves traveling in piezoelectric crystals by imaging with Coulomb coupling
Author(s): A. Habib; A. Shelke; U. Pietsch; T. Kundu; W. Grill
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Paper Abstract

Coulomb coupling has been applied for imaging of bulk and guided acoustic waves propagating in a 0.5 mm thick, z cut Lithium Niobate single-crystal. The excitation and detection of acoustic waves was performed by localized electrical field probes. The developed scheme has been applied to imaging of the transport properties of skimming longitudinal and guided acoustic waves. A short pulse of 20 ns has been used for the excitation of acoustic waves. Broadband coupling is achieved since neither mechanical nor electrical resonances are involved. The attenuation of acoustic waves in piezoelectric crystals is studied by this method. A thin film of conductive silver paint was deposited on the surface of the crystal acting as an acoustic attenuator inducing also mass loading effects and shortening of electrical fields. The group velocities of the propagating acoustic waves for both conditions, with and without the conductive silver paint film, are determined from the propagation of the acoustic wave fronts.

Paper Details

Date Published: 20 April 2012
PDF: 9 pages
Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 834816 (20 April 2012); doi: 10.1117/12.917557
Show Author Affiliations
A. Habib, Univ. Siegen (Germany)
A. Shelke, The Univ. of Arizona (United States)
U. Pietsch, Univ. Siegen (Germany)
T. Kundu, The Univ. of Arizona (United States)
W. Grill, Univ. Leipzig (Germany)

Published in SPIE Proceedings Vol. 8348:
Health Monitoring of Structural and Biological Systems 2012
Tribikram Kundu, Editor(s)

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