1984•Electronics LettersRequires access

Pyroelectric imaging of defects in bulk acoustic wave lithium niobate transducers

D. Royer, E. Dieulesaint, Peter Kummer

Abstract

Initial results on a method for testing piezoelectric transducers made of a polar material are presented. The method consists of measuring the voltage induced across the transducer electrodes by an intensity-modulated laser beam scanning the surface. Applied to a bulk acoustic wave LiNbO3 transducer, this technique has revealed domains with Z-axis reversed.

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Key concepts: Lithium niobate, Transducer, Pyroelectricity, Materials science, Piezoelectricity, Surface acoustic wave, Acoustics, Optics