Pyroelectric imaging of defects in bulk acoustic wave lithium niobate transducers

Pyroelectric imaging of defects in bulk acoustic wave lithium niobate transducers

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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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