Abstract
Surface acoustic waves (SAW) are observed in a z-cut KTP plate. Measured frequency response for x-propagation SAW waves indicates a SAW velocity of about 3940 m/s which agrees with theoretical calculations. The calculated electromechanical coupling coefficient (𝓀SAW2) is about 1%. X-propagation Bleustein–Gulyaev waves (BG) have also been observed in a y-cut KTP plate. Center frequency of a delay line with uniform interdigitated transducers indicates that BG waves possess a velocity about 4256 m/s which is also in good agreement with theory. Using known bulk parameters, the calculated electromechanical coupling coefficient for this BG wave (𝓀BG2) is ≊4%.
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