Applications of polymeric photorefractive material to reversible data storage and information processing
✍ Scribed by Hyunaee Chun; Won-Jae Joo; Nam-Jun Kim; In Kyu Moon; Nakjoong Kim
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 193 KB
- Volume
- 89
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
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 μm, exhibited a high diffraction efficiency of 92% at a low applied electric field of 30 V/μm, which corresponded a refractive index modulation of 3 × 10^−3^. 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/μm, 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. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 368–372, 2003