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Surface acoustic wave (SAW) generation on 128° YX acoustic superlattice has been investigated by considering the finite-depth of the domain created by the UV direct-domain writing. We found that bound and localized SAW will be generated when the domain depth of the ASL structure, underlying the transducer, is smaller and bigger than the lattice period, respectively. Efficient bound SAW can be achieved,...
Domain engineering 128° YX-cut lithium niobate crystals by ultraviolet direct-domain writing is reported. The evidence of the inverted domains were shown from both piezoresponse force microscopy and hydrofluoric acid etching.
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