title: Study on the electromechanical coupling coefficient of Rayleigh-type surface acoustic waves in semi-infinite piezoelectrics/non-piezoelectrics superlattices.
abstract: The electromechanical coupling coefficient of Rayleigh-type surface acoustic waves in semi-infinite piezoelectrics/non-piezoelectrics superlattices is investigated by the transfer matrix method. Research results show the high electromechanical coupling coefficient can be obtained in these systems. The optimization design of it is also discussed fully. It is significantly influenced by electrical boundary conditions on interfaces, thickness ratios of piezoelectric and non-piezoelectric layers, and material parameters (such as velocities of pure longitudinal and transversal bulk waves in non-piezoelectric layers). In order to obtain higher electromechanical coupling coefficient, shorted interfaces, non-piezoelectric materials with large velocities of longitudinal and transversal bulk waves, and proper thickness ratios should be chosen.
authors.affiliation: Applied Acoustics Institute, Shaanxi Normal University, Shaanxi Key Laboratory of Ultrasound, Xian, Shaanxi 710062, China.
authors.forename: Shi
authors.initials: S
authors.lastname: Chen
authors.forename: Yinhong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Shuyu
authors.initials: S
authors.lastname: Lin
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Fu
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004574:Electromagnetic Fields; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D008962:Models, Theoretical; D012542:Scattering, Radiation; D013016:Sound; D014159:Transducers; D014732:Vibration
keywords: Electromechanical coupling coefficient; Rayleigh-type surface acoustic wave; Superlattice