The electromagneto-acoustic surface wave in a piezoelectric medium: The Bleustein–Gulyaev mode

By discarding the quasi-static approximation, this paper gives the exact solutions of a shear horizontal electromagneto-acoustic surface wave mode in a class of piezoelectric media. As the wave speed is much less than the speed of light, the solution degenerates to the well-known Bleustein–Gulyaev wave, or Maerfeld–Tournois wave. Taking into account both optical effect as well as the contribution from the rotational part of electric field, the solutions obtained here are not only valid for any wave speed range, but also provide accurate formulas to evaluate the acousto-optic interaction due to the piezoelectricity.