Atomic force and optical near‐field microscopic investigations of polarization holographic gratings in a liquid crystalline azobenzene side‐chain polyester
Atomic force and optical near‐field microscopic investigations of polarization holographic gratings in a liquid crystalline azobenzene side‐chain polyester
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液晶偶氮苯侧链聚酯中偏振全息光栅的原子力和光学近场显微研究
DOI：
10.1063/1.115924
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发表时间：
1996
影响因子：
4
通讯作者：
S. Hvilsted
中科院分区：
文献类型：
--
作者：
P. Ramanujam;N. Holme;S. Hvilsted
对记录在偶氮苯侧链液晶聚酯中的偏振全息光栅进行了原子力和扫描近场光学显微镜研究。已经发现，紧接着激光照射，出现地形表面光栅结构。通过原子力显微镜重复扫描膜的相同区域，跟踪光栅结构的时间发展20小时。光栅结构在几小时后消失，并且已经发现发生表面粗糙度的显著增加。然而，光栅的近场光学显微镜扫描显示，膜的大部分保持光学各向异性。
Atomic force and scanning near‐field optical microscopic investigations have been carried out on a polarization holographic grating recorded in an azobenzene side‐chain liquid crystalline polyester. It has been found that immediately following laser irradiation, a topographic surface grating structure appears. The time development of the grating structure was followed by atomic force microscopy for 20 h by repeatedly scanning the same area of the film. The grating structure disappears after a few hours and a pronounced increase of surface roughness has been found to take place. A near‐field optical microscopic scanning of the grating reveals, however, that the bulk of the film remains optically anisotropic.