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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17 Jun 2003
TL;DR: In this article, the first observation of self-trapping of an optical beam in an organic photorefractive monolithic glass was reported, which brought about the possibility of using organic materials for soliton-based applications.
Abstract: We report the first observation of self-trapping of an optical beam in an organic photorefractive monolithic glass. The orientationally enhanced photorefractive nonlinearity that gives rise to spatial solitons can be switched from self-focusing to self-defocusing simply by changing the polarization of the optical beam. Our experiment brings about the possibility of using organic materials for soliton-based applications.
2 citations
23 Oct 1998
TL;DR: In this paper, the authors developed several photorefractive polymers that contain chromophores designed to have simultaneously a large dipole moment and a high linear polarizability anisotropy, and nematic phase liquid crystal droplets, generally used for liquid crystal applications.
Abstract: The refractive index modulation in photorefractive polymers with a low glass transition temperature is dominated by orientational birefringence effects. To take advantage of these effects we developed several photorefractive polymers that contain: (i) chromophores designed to have simultaneously a large dipole moment and a high linear polarizability anisotropy, (ii) nematic phase liquid crystal droplets, (iii) transparent molecules generally used for liquid crystal applications. We discuss recent advances in these three different classes materials and emphasize their merits and trade-off.© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
2 citations
20 Sep 1999
TL;DR: A numerical simulation model of two-beam interaction in photorefractive polymers is presented in this paper, where higher diffraction orders and beam fanning are included in the model.
Abstract: A numerical simulation model of two-beam interaction in photorefractive polymers is presented. Higher diffraction orders and beam fanning are included in the model. The simulation results were found to agree precisely with theoretical predictions and experiments. Edge enhancement of images in a two-beam coupling geometry is predicted.
2 citations
TL;DR: In this article, the temperature dependence of the dielectric induced photorefractive effect in K Ta 1−x Nbx O3 doped with Ti and Fe is presented.
Abstract: The temperature dependence of the dielectric induced photorefractive effect in K Ta1−x Nbx O3 doped with Ti and Fe is presented. It is shown that the results coincide with the supposition that a photorefractive effect can originate from an illumination induced change in Tc.
2 citations
01 Jan 2003
TL;DR: In this article, it was shown that the group velocity of light pulses can be reduced significantly by using the steep dispersion properties of the phase coupling effect in the photorefractive two-wave mixing process.
Abstract: We show theoretically that the group velocity of light pulses can be reduced significantly by use of the steep dispersion properties of the phase coupling effect in the photorefractive two-wave mixing process. The group velocity of light pulses of the order of 0.1 m/s can be achieved in typical photorefractive BSO crystals with an appropriate externally applied electric field and moving gratings of appropriate speeds. It is also shown that the slowly propagating light pulses can be set to be amplified after passing through the photorefractive material.
2 citations