Band structure of love wave in a one-dimensional piezoelectric layered phononic crystal with imperfect interface

Abstract

The propagation of Love wave in a phononic crystal consisting of superlattice lithium niobate substrate carrying a piezoelectric waveguide layer is analyzed. The interface between the waveguide layer and the substrate is imperfectly bonded, which is described by means of a shear spring model. Numerical results show that the bandgap shifts to a lower frequency range and the bandwidth decreases as the interface imperfection increases. Moreover, the transmission coefficient calculations using finite element simulation revealed that a perfect interface results in more effective bandgap attenuation.

Keywords:

• Love wave
• phononic crystal
• imperfect interface
• piezoelectric
• FEM
• PWE

Acknowledgment

The Y. K. Pao Visiting Professorship at Ningbo University, and the K. C. Wong Magana Fund through Ningbo University.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (Nos. 12072167, 11672141 and 11972199)