Full length article Polarised light induced birefringence in azo dye doped polymer: a new model and polarised holographic experiments
Full length article Polarised light induced birefringence in azo dye doped polymer: a new model and polarised holographic experiments
复制标题
全长文章偶氮染料掺杂聚合物中的偏振光诱导双折射：新模型和偏振全息实验
DOI：
10.1016/s0030-4018(96)00773-0
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
P. Dubois
中科院分区：
文献类型：
--
作者：
C. Maertens;P. Dubois
报道了偶氮染料DMNPAA(2，5-二甲基-4-(对-硝基苯偶氮)苯甲醚)在PVK(聚N-乙烯基咔唑)薄膜中的光致双折射。为了考虑在光致双折射实验中得到的不同结果，提出了薄膜的双层模型。根据这个模型，样品表现出本征的双折射，但吸收的光会诱导薄膜第一层中的光学活性分子取向，从而导致光致双折射。在此介质上进行了全息实验，记录波长为514 nm，读出波长为633 nm。衍射效率与偏振的关系表明，这些聚合物可以记录偏振态以及强度图案。
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 polarisation shows that these polymers can record polarisation states as well as intensity patterns.