Proceedings ArticleDOI
Nonlinear optical properties of photorefractive polymers
S. M. Silence,François Hache,M. C. J. M. Donckers,C. A. Walsh,Donald M. Burland,Gary C. Bjorklund,Robert J. Twieg +6 more
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TLDR
In this article, the photorefractive properties of polymers with optically nonlinear molecules attached in a pendant side-chain configuration are investigated using degenerate four-wave mixing (FWM) as well as two-beam coupling (2BC) techniques.Abstract:
This paper describes the recent progress of our group in the field of photorefractive polymers. Three separate systems are discussed. The first two consist of polymers with optically nonlinear molecules attached in a pendant side-chain configuration, which are made photoconductive through the addition of a molecular charge-transport agent. The photorefractive properties are investigated using degenerate four-wave mixing (FWM) as well as two-beam coupling (2BC) techniques. The latter technique is essential for confirming the photorefractive origin of the FWM signals through the observation of asymmetric 2BC. The performance of various sensitizing agents used to generate mobile charges at long wavelengths is also compared for such systems. The third system consists of a charge-transporting polymer, which is made nonlinear through the addition of a optically nonlinear guest molecule. The photorefractive properties of this system are found to be superior of those of other polymeric systems, with diffraction efficiencies of 1% in a 125 micrometers thick sample for gratings written with red light (647 and 676 nm), and a 2BC gain coefficient (Gamma) which exceeds the absorption coefficient by 7.2 cm-1 at 753 nm. These properties are comparable to those of inorganic crystals, and should generate interest in organic photorefractive materials for device applications.© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.read more
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Journal ArticleDOI
Photorefractive Polymers and Composites
TL;DR: A review of the latest developments of the young and exciting field of polymeric photorefractive materials can be found in this paper, where a volume holographic storage device based on polymeric polymers is presented.
Patent
Azo-dye-doped photorefractive polymer composites for holographic testing and image processing
Klaus Meerholz,Bernard Kippelen,N. Peyghambarian,Scott R. Lyon,Henry K. Hall,Anne B. Padias,Sandalphon,Boris L. Volodin +7 more
TL;DR: A photorefractive (PR) device comprises of a layer of a novel photore-fractive polymer composite sandwiched inbetween two transparent electrodes, which is capable of internally storing image patterns generated by interfering two coherent light beams inside the material as mentioned in this paper.
Journal ArticleDOI
Optical properties of poly(N-vinylcarbazole)-based guest-host photorefractive polymer systems.
S. M. Silence,M. C. J. M. Donckers,C. A. Walsh,Donald M. Burland,Robert J. Twieg,W. E. Moerner +5 more
TL;DR: The photorefractive properties of poly(N-vinylcarbazole) doped with a variety of nonlinear optical chromophores and sensitizing agents are surveyed and the effect of the structure of the nonlinear Optical chromophore on the photoreFractive properties is discussed.
Journal ArticleDOI
Photorefractive properties of a thiapyrylium‐dye‐sensitized polymer composite
TL;DR: In this paper, the photorefractivity properties of a thiapyrylium-dye-sensitized photore-fractive polymeric composite are presented and an apparent sublinear dependence of the photoconductivity on the illumination power density has been observed.
Journal ArticleDOI
Thiapyrylium dye sensitization of photorefractivity in a polymer composite
TL;DR: An ionic thiapyrylium dye has been used as a photocharge sensitizer for the first time in a photorefractive polymer composite containing poly(9vinylcarbazole) and 4−(N,N−diethylamino)• (β)−nitrostyrene as discussed by the authors.