Applications of polymeric photorefractive material to reversible data storage and information processing

Abstract

A polymeric photorefractive composite was prepared from a mixture of carbazole-substituted polysiloxane as a photoconducting medium, 2,4,7-trinitro-9-fluorenone as a photosensitizer, and 2-{3-[(E)-2-(dibutylamino)-1-ethenyl]-5,5-dimethyl-2-cyclohexenyliden} malononitrile as an optically nonlinear chromophore. This polymeric composite, with a thickness of 100 m, exhibited a high diffraction efficiency of 92% at a low applied electric field of 30 V/m, which corresponded a refractive index modulation of 3 ϫ 10 Ϫ3. Applications of this polymeric composite to reversible holographic data storage and pattern recognition were demonstrated. The three-dimensional image was recorded on our photorefractive film at an applied field of 30 V/m, and subsequently, a high quality image was reconstructed in a real-time operation. Pattern recognition was successfully demonstrated based on a joint-transform optical correlation.

24 Inorganic and organometallic polymers

“…A photorefractive composite material for reversible data storage was prepared using carbazole-substituted polysiloxane as the photoconducting medium. 40 The exciting catalytic formation of siloxane-containing nanowires by using gold nanoparticles was reported by Klabunde and co-workers. 41 Digestive ripening experiments of large polydisperse Au-ketone-stabilised colloids with the silane (C 18 H 37 SiH 3 ) were used to form small gold nanoparticles with a narrow size distribution.…”

Palladium-based micellar nanohybrids: preparation and nonlinear optical response

“…Polymer-based materials exhibiting interesting optical and electronic properties have attracted signicant attention due to their potential use in various applications including organicbased photovoltaics, 1,2 polymer light emitting diodes, 3 thin lm transistors and sensors, 4 optical switching, 5 optical data storage and information processing. 6,7 Carbazole-containing polymers in which the carbazole unit is located in either the main or in the side chain, belong to one of the most investigated systems in the area of polymer-based optoelectronic materials. 8 Such materials present good electroand photoactive properties, high charge carrier mobilities, hole transporting capability and electroluminescent properties.…”

Well-defined fluoro- and carbazole-containing diblock copolymers: synthesis, characterization and immobilization onto Au-coated silicon surfaces

“…Polymer-based materials exhibiting electro-active functionalities have attracted significant attention due to their potential use in various optoelectronic applications including organic-based photovoltaics, 1,2 polymer light emitting diodes, 3,4 thin film transistors and sensors, 5,6 optical switching, 7,8 optical data storage and information processing. 9,10 Carbazole-containing polymers belong to this class and are highly attractive due to their potential applications as photoconductors and photorefractive or charge transporting materials. Further applications of these materials include the development of light-emitting diodes (LEDs), electrochemical and gas sensors 11,12 and photovoltaic devices.…”