Abstract
In theoretically studying electromagnetic surface wave propagation in crystals possessing piezoelectric properties, we found that, if the frequency is smaller than typical phonon frequencies (not exceeding 1012–1013 Hz), then electric fields are able to generate elastic vibrations because of the piezoelectric effect. In this case, an electromagnetic surface wave is coupled with bulk acoustic modes propagating from the interface to the interior of the structure. As a result, the surface wave attenuates because of the radiation of acoustic waves. The attenuation factor is proportional to the parameter τ2 va/vel, where τ is the electromechanical coupling coefficient, and va and vel are typical speeds of acoustic and electromagnetic waves in the crystal, respectively.
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