Polarized light induced birefringence in azo dye doped polymer: A new model and polarized holographic experiments

被引：0

作者：

Blanche, P.-A. ^{[1
]}

Lemaire, Ph.C. ^{[1
]}

Maertens, C. ^{[1
]}

Dubois, P. ^{[1
]}

Jerome, R. ^{[1
]}

机构：

[1] Universite de Liege, Angleur-Liege, Belgium

来源：

| 1997年 / Elsevier Sci B.V., Amsterdam, Netherlands卷 / 139期

关键词：

Azo dyes - Birefringence - Electromagnetic wave diffraction - Holography - Light absorption - Light polarization - Molecules - Nitrogen compounds - Photochemical reactions - Thin films;

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摘要：

The photoinduced birefringence of azo dye DMNPAA (2,5-dimethyl-4-(p-nitrophenylazo)anisole) in PVK (poly(N-vinylcarbazole)) thin film is reported. A two-layer model of the film is proposed to take into account the different results obtained in photoinduced birefringence experiments. According to this model, the sample exhibits intrinsic birefringence but the absorbed light can induce orientation of the optically active molecules contained in the first layer of the film, leading to photoinduced birefringence. Holographic experiments have been carried out in this media with recording at 514 nm and readout at 633 nm. Diffraction efficiency versus polarization shows that these polymers can record polarization states as well as intensity patterns.

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页码：1 / 3