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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03 May 1998
TL;DR: In this paper, the authors used InP:Fe to explore the bandwidth of the hologram written by two beams from a laser at 980 nm using non-degenerate four wave mixing.
Abstract: Summary form only given. We use InP:Fe because it has been demonstrated to be a prominent photorefractive semiconductor with high two-wave-mixing gain. Experimentally we use nondegenerate four wave mixing to explore the bandwidth of the hologram written by two beams from a laser at 980 nm.
17 Jun 2003
TL;DR: In this article, a composite based on a rigid backbone of poly(p-phenyleneterephthalate) and pendent carbazole groups (PPT-CZ), the nonlinear optical chromophore piperidinodicyanostyrene (PDCST), and the sensitizer C60 showed in reflection geometry a gain coefficient of 104 cm-1 and a diffraction efficiency of 4.8 percent for an applied electric field of +60 V/mm.
Abstract: Photorefractive polymers possessing a layered structure are shown to exhibit excellent photorefractive properties in the reflection grating geometry. A composite based on a rigid backbone of poly(p-phenyleneterephthalate) and pendent carbazole groups (PPT-CZ), the nonlinear optical chromophore piperidinodicyanostyrene (PDCST), and the sensitizer C60 shows in reflection geometry a gain coefficient of 104 cm-1 and a diffraction efficiency of 4.8 percent for an applied electric field of +60 V/mm. The investigated composites do not contain any plasticizer. Nevertheless the layered structure insures excellent stability without sacrifying the large rotational electro-optic effect connected with a very low glass transition temperature associated with the side chain motion.
27 Jun 1999
TL;DR: In this article, a semi-insulating lnGaAs/GaAs multiple quantum wells were constructed and the two-wave mixing gain and the fourwave mixing diffraction efficiency at the wavelengths around the excitonic resonance of 0.93 µm were investigated.
Abstract: We fabricate semi-insulating lnGaAs/GaAs multiple quantum wells and measure the two-wave mixing gain and the four-wave mixing diffraction efficiency at the wavelengths around the excitonic resonance of 0.93 µm. The important properties including spatial resolution, saturation intensity and response time are experimentally investigated. The photorefractive response time of 100 µs is obtained at the wavelength of 924.5 nm with the intensity of 7 mW /cm2.
01 Jan 2000
TL;DR: In this article, the authors focus on charge carrier dynamics in organic photorefractive materials and make a connection between photoconductive properties and optical response times, i.e., charge transport and trapping, in order to determine the interplay of a number of processes related to the photoconductivity of the material.
Abstract: Organic photorefractive materials react quickly to an incident light intensity modulation; their optical response times can be as low as a few milliseconds. This time scale is determined by the interplay of a number of processes which are primarily related to the photoconductivity of the material. The present contribution focuses on charge carrier dynamics, i.e. charge transport and trapping, in organic photorefractive materials. Starting from a discussion of the transport mechanisms, the relevant parameters and length scales are determined. At the end, a connection between photoconductive properties and optical response times is presented.
01 Jan 1996