Longitudinal resonance in surface acoustic phonons

Abstract

A detailed study of the longitudinal surface resonance of leaky wave in the acoustic spectrum of solids is carried out. The authors study the lineshape of the resonance in the power spectrum of both isotropic and anisotropic solids. The physical meaning of the new mode is investigated in connection with the reflection coefficients of bulk waves at the free surface and with the amplitude of vibration of Lamb waves.