Two-dimensional phononic crystal based on-chip surface acoustic waves convergence

Abstract Surface acoustic wave (SAW) technology is widely used in microwave electronics, and is often used to produce such devices as filters, sensors and actuators. In this work, a structure constructed by a two-dimensional phononic crystal (PnC) is designed to converge two incident SAWs. Based on the equifrequency contour (EFC) theory and unique band characteristic at high-symmetric point, aggregating SAWs within the PnC region and then the converged output could be observed. This specific utilization of PnC to converge SAWs can be a useful complement to the delicate manipulation, which can be highly desirable for developing SAWs device.