Topic
Organic photorefractive materials
About: Organic photorefractive materials is a research topic. Over the lifetime, 697 publications have been published within this topic receiving 13041 citations.
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TL;DR: In this article, the influence of optical beam coupling on the generation of subharmonic gratings in a photorefractive sillenite crystal was investigated using the ac field technique.
Abstract: Using the so-called ac field technique, we investigate experimentally the influence of optical beam coupling on the generation of subharmonic gratings in a photorefractive sillenite crystal. By the use of two different recording configurations, we are able to distinguish between effects caused by material nonlinearities and effects caused by optical beam coupling.
9 citations
01 Apr 1992
TL;DR: In this paper, the decay of the photorefractive signal in Bi2TeO5 has multiple components and several different contributions to this signal were identified, one of which has a lifetime of months and therefore has potential for holographic memory applications.
Abstract: Bismuth tellurite (Bi2TeO5) is a new photorefractive material that is now available as single crystals of high optical quality. The results of measuring the photorefractive properties of Bi2TeO5 crystals are reported and the properties of this material are compared to those of well known photorefractive crystals. The decay of the photorefractive signal in Bi2TeO5 has multiple components and several different contributions to this signal were identified. One of the components has a lifetime of months and therefore has potential for holographic memory applications. This long-lived photorefractive signal is attributed to ion displacements and it can be produced by both continuous wave and short pulse write beams. Several experimental conditions were investigated to enhance this photorefractive signal.© (1992) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
9 citations
TL;DR: In this article, the photorefractive polymer contains a second-order nonlinear optical chromophore and a charge transporting group, which exhibits low glass transition temperature of about 52 °C.
9 citations
9 citations
TL;DR: The photorefractive holograms have received great attention for decades due to their transmissive geometries and dynamic nature as discussed by the authors, and it is anticipated that PR materials will be the center of optoelectronic material research in the near future.
Abstract: Photorefractive holograms have received great attention for decades due to their transmissive geometries and dynamic nature. The PR mechanism involves charge generation, charge transport, charge trapping, and modulation of the refractive index. So far, photorefractive hologram is regarded as one of the most important holographic materials with dynamic features. Since the first PR mechanism was described about 50 years ago, extensive investigations have been undertaken by many researchers and it is anticipated that PR materials will be the center of optoelectronic material research in the near future. This article reviews the current understanding of the mechanism responsible for the PR effect and current research trends, and briefly introduces recent progress in applications and material design.
9 citations