A PVK-Based High-Performance Photorefractive Polymer Composite Under a Low External Electric Field

摘要

We describe a PVK-based photorefractive polymer composite doped with disperse red 1, poly-butylacrylate and TNF. Using the two-beam coupling experiment, we investigate its photorefractive properties as well as the dynamic process of the index gratings in the sample. We observe the photorefractive effect in the absence of an applied external electricfield. The two-beam coupling gain coefficient was measured to reach a value as high as 140 cm- 1 in the absence of an external applied electric field and a value of 470 cm-1 at a poling dc electric field of 25 V/μm.