Abstract
We present device responses due to fast shear and longitudinal waves, which propagate between a pair of IDTs on an upper surface via a reflection from the lower surface of a parallel-sided plate of 41°-rotated Y-cut lithium niobate. Single-mode response can be obtained by removing unwanted modes using saw cuts in the crystal substrate. Centre-frequency and bandwidth enhancement of a factor of two or more are achievable compared with the SAW response of the same IDTs.
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