OPTICAL DETECTION OF ACOUSTIC WAVES IN QUARTZ SUBSTRATE EXCITED BY INTERDIGITAL TRANSDUCERS
光衍射法观测叉指换能器在石英晶体中激发的各种声波

Utilizing the method of optical diffraction produced by acousto-optical interac-tion, we have studied both surface and bulk acoustic waves from the optical diffraction patterns or the inverse phase velocity surfaces excited by interdigital transducers in quartz, with special emphasis on these waves produced in the z-cut crystal. A SAW different from normal Rayleigh waves has been found. On the ground of a brief discussion, we conclude that in many aspects the nature of this wave and/or similar wave disturbances is worthy for further investigations.