Apostoluk Aleksandra, Nunzi Jean-Michel, Fiorini-Debuisschert Céline
Laboratoire des Propriétés Optiques des Matériaux et Applications, Unité Mixte de Recherche--Centre National de la Recherche Scientifique 6136, Université d'Angers, 2 Boulevard Lavoisier, 49045 Angers, France.
Opt Lett. 2004 Jan 1;29(1):98-100. doi: 10.1364/ol.29.000098.
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.
使用全光极化方法，我们观察到在侧链位置含有偶氮染料分子的非晶态聚合物薄膜中形成了表面起伏光栅（SRG）。该实验由一个种子型过程组成。我们使用了最近描述的一种实验装置，该装置允许通过玻璃的折射率色散产生周期性非线性图案。这种特殊配置使得可以观察到偶氮发色团的光致平移扩散作为SRG形成的起源。通过原子力显微镜对使用写入光束的s（TE）和p（TM）偏振记录的光栅进行分析。这种效应归因于质量从高异构化活性区域向低活性区域的传输。
