Photoinduction of surface-relief gratings during all-optical poling of polymer films.
Photoinduction of surface-relief gratings during all-optical poling of polymer films.
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聚合物薄膜全光学极化过程中表面浮雕光栅的光感应。
DOI：
10.1364/ol.29.000098
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发表时间：
2004
期刊：
影响因子：
3.6
通讯作者：
C. Fiorini
中科院分区：
文献类型：
--
作者：
A. Apostoluk;J. Nunzi;C. Fiorini
利用全光极化方法，在侧链含有偶氮染料分子的非晶聚合物薄膜中观察到了表面浮雕光栅的形成。该实验由播种型过程组成。我们使用了最近描述的实验装置，允许由玻璃的折射率色散产生周期性的非线性图案。特定的配置允许光诱导的翻译扩散的偶氮生色团被观察到的SRG形成的起源。利用原子力显微镜对写入光的s（TE）和p（TM）偏振态记录的光栅进行了分析。该效应归因于从高异构化活性区域到低活性区域的质量传输。
Using the all-optical poling method, we observed the formation of a surface-relief grating (SRG) in an amorphous polymer film containing azo dye molecules in side chain positions. The experiment consists of a seeding-type process. We used a recently described experimental setup that permits a periodic nonlinear pattern to be produced by the index dispersion of glass. The particular configuration permits photoinduced translation diffusion of the azo chromophores to be observed as the origin of the SRG formation. Analyses of the gratings recorded by use of s (TE) and p (TM) polarization of the writing beams are conducted by atomic-force microscopy. The effect is attributed to mass transport from regions of high isomerization activity to regions of lower activity.