An acoustoelectric-induced tailorable coupled resonator surface acoustic waveguide

Abstract Here, we introduce a tailorable coupled resonator surface acoustic waveguide (CRSAW), based on linear defect of elliptical cylinders inside phononic crystal ZnO pillars Si substrate. The designed resonators allow the emergence minimally dispersive, monomode shear-guiding band local resonance bandgap, owing to their partially broken structural symmetry in comparison with previously reported counterparts such as and hollow cylinders. Moreover, by introducing reconfigurable behavior, benefit from acoustoelectric-induced elasticity modulation ZnO, which is semiconducting piezoelectric material. Switching conductivity structures between two limiting low high values (0.01 S m −1 100 ), considerable at full width half maximum (FWHM) (ΔFWHM = −21%) guiding frequency (Δ f d −2.81%) are achieved for optimized cylinder CRSAW while maintaining an acceptable loss value. Benefiting proposed ZnO-based CRSAW, have simultaneous low-bandwidth behaviors, without involving significant fabrication complications. open up new horizons toward realization promising building blocks designing miniaturized SAW RF-filters, demultiplexers, Mach–Zehnder devices wireless communications applications.