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首页> 外文会议>Organic photonic materials and devices XIX >Photoanisotropy in polarization-sensitive polymer materials based on the media with ovalently-bonded components
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Photoanisotropy in polarization-sensitive polymer materials based on the media with ovalently-bonded components

机译：基于具有椭圆键合成分的介质的偏振敏感聚合物材料中的光各向异性

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The well-known scalar photochromism phenomenon is a reversible phototransformation of chemical species between two forms having different absorption spectra. It is observed under the action of actinic light regardless of its polarization state. Unlike this in some high-efficient polarization-sensitive azopolymeric materials, we have observed a well-developed vector polyphotochromism which appears as a light-induced area with spectral selectivity for the linearly polarized probing beams. A sharp change in the transmission spectrum of the material have been observed when we placed an irradiated area of the sample between crossed polarizers, while the transmission spectrum of the sample remained practically unchanged in case of probing by unpolarized light. The effect has a purely vector nature, while the transmission spectrum of the exposed material essentially changes in case of observing between crossed polarizers and the change in the spectrum unambiguously depends on the energy exposure. A significant dependence of the kinetic of the vector polyphotochromism induction on the power density of linearly polarized actinic light (445 run) is shown for probing beam of 635 nm. It is also shown that the kinetics of the effect depends on the photosensitive layer thickness and the concentration of the chromophore. The experiments were carried out for two synthesized side-chain azopolymers obtained as immobilized polar azo dyes on polymethylmethacrylate backbone. It is clearly shown a light-controlled spectral selectivity of the sample activated by the various doses of the stimulating radiation.
机译：众所周知的标量光致变色现象是具有不同吸收光谱的两种形式之间化学物种的可逆光转化。不论其偏振态如何，都可以在光化光的作用下观察到它。与某些高效偏振敏感的偶氮聚合物材料不同，我们观察到了完善的矢量多色致变色现象，它表现为对线性偏振探测光束具有光谱选择性的光诱导区域。当我们将样品的辐照区域放在交叉偏振器之间时，观察到材料的透射光谱发生了急剧变化，而在使用非偏振光进行探测的情况下，样品的透射光谱实际上保持不变。该效果具有纯矢量性质，而在交叉偏振镜之间观察时，曝光材料的透射光谱会发生本质变化，并且光谱的变化明确取决于能量暴露。对于635 nm的探测光束，矢量多色致变色动力学的动力学对线性偏振光化光的功率密度（445纳米）有很大的依赖性。还显示出该效应的动力学取决于光敏层的厚度和生色团的浓度。对两种合成的侧链偶氮聚合物进行了实验，它们是作为固定的极性偶氮染料固定在聚甲基丙烯酸甲酯骨架上的。清楚地示出了由各种剂量的刺激辐射激活的样品的光控光谱选择性。

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