title: The scattering of surface acoustic waves by electrical effects in two-dimensional metal film structures.
abstract: A theory is presented for the scattering of surface acoustic waves by electrical effects in thin metal films of arbitrary shape on the surface of a piezoelectric material. A Green's function approach is used, and an expression for the two-dimensional Green's function appropriate to the problem is given. General expressions are obtained for the far-field radiation pattern and for the response of an interdigital transducer to a single scatterer. Expressions for the reflection and velocity perturbation due to periodic arrays of scatterers are also presented. Good agreement is found when the theoretical predictions are compared with a wide range of experimental results on lithium niobate.
authors.affiliation: Dept. of Eng. Sci., Oxford Univ.
authors.forename: F
authors.initials: F
authors.lastname: Huang
authors.forename: E S
authors.initials: ES
authors.lastname: Paige