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/20>δ−b>−α/2, where δδ is the guiding parameter, b   is the propagation constant, and αα is the parameter related to the wavelength and the PP crystal. We show that when δ>0δ>0, the part of the energy concentrated in the PP crystal is always higher than that in the linear dielectric and that when δ<0δ<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<0δ<0 is bigger than that for δ>0δ>0.

► Localized surface waves at the interface between two media are investigated. ► These localized surface waves can be established provided that 0>δ−b>−α/20>δ−b>−α/2. ► When δ>0δ>0, energy concentrated in PP crystal is higher than that in linear dielectric. ► When δ<0δ<0, energy concentrated in linear dielectric decreases with an increase in b  . ► Energy concentrated in linear dielectric for δ<0δ<0 is bigger than that for δ>0δ>0.