Influence of a thin conducting transverse layer on the properties of quasitransverse shear waves and Lamb waves in gallium arsenide plates

An investigation was made of the influence of a thin conducting surface layer on the damping and velocity of acoustic waves in gallium arsenide plates. It was observed that the square of the coefficient of electromechanical coupling for specific directions of propagation of Lamb waves and quasitransverse shear waves is an order of magnitude higher than that for surface acoustic waves. Thus, the conductivities of the substrate and the surface layer have a stronger influence on the damping of waves in the plates than in the case of surface acoustic waves. Pis’ma Zh. Tekh. Fiz. 25, 38–43 (February 12, 1999)