Photorefractive surface waves at the interface of Sr_0.6Ba_0.4NbO₃and air with diffusion mechanism

Abstract

Photorefractive surface waves on the surface of Sr 0.6 Ba 0.4 NbO 3 with a diffusion mechanism of nonlinearity have been observed. The formation time of the photorefractive surface waves is related to the intensity of the incident beam and the background illumination. The formation time of the photorefractive surface waves is about 40 min with a beam intensity of 3 mW, 25 min with 10 mW, and 30 s with 10 mW when an additional background illumination is applied. The experimental results showed that an appropriate background illumination will shorten the photorefractive response time.