Theoretical study of photorefractive effect in reduced potassium niobate crystals

Abstract

Study of photorefractive properties for reduced potassium niobate was performed with using a band model for one impurity center, Which is allowed to study the photoconductivity, to calculate the light induced absorption, to study the space charge field and the exponential gain in the absence of the applied field, as function of the light intensity, the wavelength and the grating spacing. It also allows to study the exponential gain and the phase appear between the space charge field and the illumination as function of the applied field.