The Green's function for surface acoustic waves: Comparison between theory and experiment

The transient displacement of the surface acoustic wave caused by a transient impulse line source on it sample consisting of a substrate covered by a thin layer is calculated. Starting from the Green's tensor for an anisotropic semi-infinite half-space, the layer, which will introduce dispersion, is considered its a perturbation of this half-space. Numerical results and experimental data, obtained with an all optical technique, for an isotropic layer on an isotropic half-space are compared and show good agreement.