Influence of the Core Pillar Height on the Bandgap Characteristics of Piezoelectric Phononic Crystals with Ring-Shaped Grooves

Dispersion profiles and surface acoustic wave attenuation characteristics of ring-shaped phononic crystals are investigated as a function the core pillar height. Finite element method simulations carried out for both band analyses transmission spectra calculations. The results reveal that increasing height in decrement local resonance frequency corresponding peaks. obtained dispersion show crystal bandgap also expands from 6 MHz to 11 while increases 5 um 7 um. Similar seen varying heights periodic grooves. In addition, competency depends on frequencies where functional can be tuned by adjusting