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Optical Nonlinearity of C70-Sensitized Photorefractive Compositions Caused by Production of Anion-Radicals

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Abstract

The origin of the optical nonlinearity of an organic polymeric composition including fullerene C70 and poly(9-vinylcarbazole) (PVK) was investigated by two- beam coupling and self-action of a cw laser beam at 633 nm, and spectroscopically. The local nonlinearity of the photorefractive polymer was found to be caused by the difference in polarizability of fullerene C70 and its light-induced anion-radicals, C70, C702 etc.

© 2001 Optical Society of America

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