Effect of leaky SAW parameters on V(z) curves obtained by acoustic microscopy

Abstract

V(z) curves are measured by a reflection-acoustic-microscope system in the nonscanning version. As for V(z) curves, leaky SAWs at the interface of water/solid are known to play an important role. In the letter, the effect of leaky SAW parameters, i.e. phase velocity and attenuation factor, has been numerically analysed on V(z) curves. The numerical calculation is performed for an acoustic line-focus-beam lens by introducing an idealised reflectance function where only a solution of leaky SAW is taken into consideration. It is clarified that the interval of dips and the shape of V(z) curves are strongly affected by the phase velocity and the attenuation factor, respectively.