Showing papers on "Organic photorefractive materials published in 1984"
TL;DR: In this article, the authors showed that the light-induced erasure rate of a refractive index grating depends on the optical intensity of the grating and showed that higher optical intensity is required to achieve high-speed operation of BaTiO3 devices than previously thought.
Abstract: We present data on the speed of light‐induced refractive index changes in a BaTiO3 single crystal. The light‐induced erasure rate of a refractive index grating is shown to depend on optical intensity as I x where x<1. The exponent x depends weakly on temperature and increases from 0.62±0.02 to 0.71±0.02 when the temperature is varied between 12 and 40 °C. The sublinear dependence of rate on intensity implies that higher optical intensity is required to achieve high‐speed operation of BaTiO3 devices than previously thought. The dark erasure rate has an anomolously strong temperature dependence; it increases by a factor of 50 over the same temperature range. We have also determined that the number density of photorefractive charge carriers is 6×1016 cm−3 in this crystal.
120 citations
23 May 1984
TL;DR: A survey of optical applications of the photorefractive effect can be found in this article, where the authors describe the use of photore-fractive crystals as holographic storage elements, optical image amplifiers, phase conjugate mirrors, correction elements for intracavity laser distortions, and coherent image processors.
Abstract: The physics of the photorefractive effect and the unique nonlinear optical properties of photorefractive crystals are described. A survey of the optical applications of the photorefractive effect follows. We include the use of photorefractive crystals as holographic storage elements, optical image amplifiers, phase conjugate mirrors, correction elements for intracavity laser distortions, phase conjugate windows for field transmission through inhomogeneous media, and coherent image processors.
5 citations
TL;DR: In this article, a review of recent nonlinear optical experiments with photorefractive ferroelectrics is presented. But the focus is not on the photore-fractive effect but on the linear electro-optic effect driven by photoinduced space-charge fields.
Abstract: In recent years ferroelectric materials with their large electrooptic coefficients have found new optical applications in the field of phase conjugate optics, image processing and dynamic holography. Some of these applications are based on the photoinduced refractive index changes or photorefractive effect which are due to the linear electro-optic effect driven by photoinduced space-charge fields. In this paper we give a review of recent nonlinear optical experiments with photorefractive ferroelectrics.
1 citations