Study on interface guided mode of 2D heterostructures dislocation defect phononic crystal

摘要

The effect on the guided modes in the gaps of the 2D mercury/water squared phononic crystal (PC) heterostructures dislocation, with the two kinds of dislocation, is studied with the plane-wave and the super cell methods. The results show that for the prototype heterostructure, there are no interface guided modes in the gaps, while the transverse, longitudinal dislocation can generate guided modes at the interface, which allow the sonic wave in the frequency range of the forbidden ones to transport along the dislocation channel and thus make the PC a sonic wave guide.