Localized surface waves at the interfzace between a linear dielectric and a photovoltaic-photorefractive crystal

We study localized surface waves at the interface between a linear dielectric and a photovoltaic-photorefractive (PP) crystal. These localized surface waves can be established provided that 0>δ-b>-α/2, where δ is the guiding parameter, b is the propagation constant, and α is the parameter related to the wavelength and the PP crystal. We show that when δ>0, the part of the energy concentrated in the PP crystal is always higher than that in the linear dielectric and that when δ<0, the part of the energy concentrated in the linear dielectric decreases with an increase in b. We find that the part of the energy concentrated in the linear dielectric for δ<0 is bigger than that for δ>0. Crown