Abstract: Photorefractivity, or reversible photoinduced refractive index change, was first observed about twenty-five years ago in inorganic crystals. The photorefractive effect involves generation, transport and trapping of charges and a change of the refractive index through the electro-optic effect. We have synthesized a photorefractive crosslinked polymer material in which the active components, derivatives of diethylaminobenzaldehyde diphenylhydrazone and para- nitroaniline, are chemically linked into the polyurethane network. During the crosslinking of the polyurethane the para-nitroaniline groups were aligned (poled) by an external electric field, which resulted in a non-centrosymmetric polymer material. This material was shown to be photorefractive by the two beam coupling experiment, without the application of an external electric field.
Publication Year: 1993
Publication Date: 1993-12-16
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 2
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