Abstract

One of the reasons for the missing technological implementation of photorefractive organic materials is their relatively low speed as compared to inorganic systems. The origin of the speed limit can be related to either the photoelectric properties of the materials or to reorientation of nonlinear optical chromophores in a space-charge field. This contribution focuses on the first aspect. Using holographic and pulsed experiments, we determine the charge carrier mobility in two bifunctional glasses. The charge generation efficiency is measured by a xerographic technique. Both properties are related to a holographic characterization of the sample by cw two-beam coupling and degenerate four-wave mixing experiments. We discuss the limiting factors for the holographic response and ways how to overcome them.

© 1999 Optical Society of America

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