Vp. Plessky, A SIMPLE CLOSED-FORM DISPERSION-EQUATION FOR SHEAR TYPES OF SURFACE-WAVES PROPAGATING IN PERIODIC STRUCTURES, IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 40(4), 1993, pp. 421-423
A closed form dispersion relation for shear surface acoustic wave (SAW
's) (Bleustein-Gulyaev (BGW), surface transverse waves (STW's), leaky
waves) propagating in periodic structures in the frequency range corre
sponding to the Bragg stopband is found. The consideration includes th
e changes in spatial structure of the waves mutually reflecting on the
grating as well as bulk wave scattering. A comparison with numericall
y obtained dispersion curves for leaky waves on 36-LiTaO3 shows good a
greement.