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The velocity of surface acoustic waves in proton-exchanged 128°-rotated Y cut X propagation lithium niobate with a Cu or Al thin film deposited on the sample surface has been measured using acousto-optic techniques in a wide frequency range. The electrical and mechanical perturbations of the propagation surface introduced by the metal film affects the acoustic velocity, thus providing a mean for its accurate control.
Inspec keywords: interdigital transducers; metallic thin films; surface acoustic waves; ultrasonic velocity; acousto-optical effects; ion exchange; ultrasonic propagation; lithium compounds
Other keywords:
Subjects: General linear acoustics; Ultrasonics, quantum acoustics, and physical effects of sound; Sonic and ultrasonic transducers and sensors; Acoustic wave devices; Measurement of acoustic variables