16 December 1993 Photorefractivity in polymeric composite materials
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Abstract
The results of photorefractivity studies in newly developed polymer composite C60/PVK/DEANST are presented. The composite contains fullerene (C60) photosensitizing molecules, second-order active molecules of diethylaminonitrostyrene (DEANST) and charge transporting polymeric matrix of poly[N-vinylcarbazole] (PVK). Photorefractive properties of the material were investigated using erasable volume holography and two-beam coupling techniques. Additional information was obtained from the results of photoconductivity, electro-optic modulation and the angular dependence of holographic diffraction. The kinetics of the effect, as well as the writing beams and the external dc field switching of the refractive grating are discussed. A previously developed theory of space-charge field gratings formation in photoconductive polymers is used to calculate four-wave mixing diffraction efficiency.
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Maciek E. Orczyk, Jaroslaw W. Zieba, Paras N. Prasad, "Photorefractivity in polymeric composite materials", Proc. SPIE 2025, Nonlinear Optical Properties of Organic Materials VI, (16 December 1993); doi: 10.1117/12.165267; https://doi.org/10.1117/12.165267
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KEYWORDS
Polymers

Electro optics

Composites

Diffraction

Diffraction gratings

Quantum efficiency

Birefringence

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