Photorefractive properties of an unsensitized polymer composite based on a dicyanostyrene derivative as nonlinear optical chromophore
Applied Physics Letters, ISSN: 0003-6951, Vol: 87, Issue: 26, Page: 1-3
2005
- 11Citations
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Article Description
We report on the photorefractive (PR) properties at the 633 nm laser wavelength of a polymer composite based on the polymer poly (n -vinyl carbazole) (PVK), doped with the dicyanostyrene derivative 4-piperidinobenzylidene- malonitrile (PDCST) as nonlinear optical chromophore and the liquid plasticizer butyl benzyl phthalate (BBP), without the presence of sensitizer. The PR-effect is observed only when samples are previously subjected to an electric field (i.e., 20 Vμm for 10 min). Photoconductivity and birefringence of the composite become significant when the electric field treatment is performed at temperatures higher than room temperature (24 °C). Gain coefficient and PR speed, determined from two-beam coupling experiments, are compared to those obtained with the PVKPDSCTBBP C60 standard sensitized composite. © 2005 American Institute of Physics.
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