scispace - formally typeset
Search or ask a question
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.


Papers
More filters
Journal ArticleDOI
Yishen Qiu1, Zhiqiang Zheng1, Tuansun Lu1, Wenchai Huang1, J. Zhuang1, D. Y. Tang1 
TL;DR: Incoherent-to-coherent conversion by use of the photorefractive beam-fanning effect and amplification by two-wave coupling have been demonstrated experimentally in a photoreFractive Ba(1-x)Sr(x)TiO(3) crystal.
Abstract: Incoherent-to-coherent conversion by use of the photorefractive beam-fanning effect and amplification by two-wave coupling have been demonstrated experimentally in a photorefractive Ba1-xSrxTiO3 crystal. The converted coherent image is amplified by 60×. The resolution of the amplified coherent image is ∼28 line pairs/mm. A notable advantage of the method is that incoherent-to-coherent conversion and coherence amplification of the converted coherent image are realized simultaneously in a photorefractive crystal.
Proceedings ArticleDOI
09 Oct 1997
TL;DR: In this article, a new class of electron donor-acceptor substituted low molar mass and polymeric stilbenes is described, where the phosphonate ester functionality is employed as the electron-withdrawing moiety, affording excellent solubility.
Abstract: Nonlinear optical (NLO) chromophores are essential components in photorefractive materials. Several stilbene derivatives, functionalized with an electron-donating substituent in the 4-position and electron-withdrawing substitutent in the 41-position, are known to display second-order NLO properties. Commonly used electron-donating groups include ether and amino, while electron-withdrawing groups include nitrile, nitro, and sulfone. Many of the NLO chomophores have absorptions that extend well into the visible wavelength range, potentially interfering with charge generation or sensitization. Additionally, crystallization of NLO chromophores in doped polymer systems often occurs and is undesirable. We wish to report the synthesis and characterization of a new class of electron donor-acceptor substituted low molar mass and polymeric stilbenes. The phosphonate ester functionality is employed as the electron-withdrawing moiety, affording excellent solubility. These materials are single component, i.e., the charge transport functionality is covalently incorporated into the NLO chromophore.
Journal ArticleDOI
TL;DR: In this paper, the second-order phase transition of a semilinear photorefractive coherent oscillator with two counter-propagating pump waves was shown to be the second order phase transition.
Proceedings ArticleDOI
28 Apr 1995
TL;DR: A new class of local photorefractive materials based on the properties of deep electron traps known as DX centers which occur in some doped compound semiconductors is reported, showing 30 times larger refractive index changes and 60 times better sensitivity to exposing light, grating-period independent sensitivity, and an absence of erasure which normally occurs during multiple-grating exposures in conventional materials.
Abstract: Photorefractive materials have often been proposed as optical storage as well as optical interconnection media but attempts to build practical systems have been hindered by fundamental limitations of the materials themselves. Recently we have reported a new class of local photorefractive materials based on the properties of deep electron traps known as DX centers which occur in some doped compound semiconductors. These materials overcome many of the problems associated with the conventional materials showing 30 times larger refractive index changes, 60 times better sensitivity to exposing light, grating-period independent sensitivity, and an absence of erasure which normally occurs during multiple-grating exposures in conventional photorefractive materials. The price of all of these advantages is, at least for the present, that the effect in the new materials is persistent only at cryogenic temperatures. Work is underway to identify materials exhibiting these properties at room temperature.
Journal ArticleDOI
30 Oct 2009
Abstract: The process of refractive index grating formation in a photorefractive crystal, used as the self-adapting spectral filter in an external cavity laser, is studied with a self-consistent model The model is based on the Finite Difference solution of the Kukhtarev equations The results obtained are compared with approximate analytical models

Network Information
Related Topics (5)
Photoluminescence
83.4K papers, 1.8M citations
80% related
Band gap
86.8K papers, 2.2M citations
79% related
Laser
353.1K papers, 4.3M citations
78% related
Optical fiber
167K papers, 1.8M citations
78% related
Thin film
275.5K papers, 4.5M citations
78% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20231
20211
20201
20181
20172
20165