Profiles of optical surface waves formed at the metal - photorefractive crystal interface

Photorefractive surface waves propagating in a stationary regime along the surface of the metal - photorefractive crystal (SBN-75) interface are considered. The transverse structure of the optical field distribution is calculated in the near- and far-field zones, depending on the angle of incidence of the exciting wave. The calculation results are in good agreement with the published experimental results. It is shown that the photorefractive effect leads to a splitting of the spectrum of a surface plasmon polariton excited at the metal - photorefractive crystal interface.