Dynamics of photoalignment in azo-dye-doped liquid crystals

被引：20
|
作者：
Huang, Chia-Yi [1 ]
Lin, Yi-Ru [2 ]
Lo, Kuang-Yao [2 ,3 ]
Lee, Chia-Rong [1 ]
机构：
[1] Natl Cheng Kung Univ, Inst Electroopt Sci & Engn, Tainan 701, Taiwan
[2] Natl Chiayi Univ, Inst Optoelect & Solid State Elect, Chiayi 600, Taiwan
[3] Natl Chiayi Univ, Dept Appl Phys, Chiayi 600, Taiwan
来源：
APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 18期
关键词：
adsorbed layers; dyes; light scattering; liquid crystals; Mie scattering; Rayleigh scattering; surface morphology;
D O I：
10.1063/1.3021379
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A transmitted light without analyzer was led into the pump-probe twist nematic experiment in azo-dye-doped liquid crystals to observe the light scattering from the dye-adsorbed surface during photoalignment. The morphology of the dye-absorbed surface monitored by this transmitted light is correlated with the formation of the ripple structure, which is reflected by the anchoring of the dye-adsorbed layer, which is, in turn, revealed by measuring the surface director reorientation angle throughout the process. As the regular ripple structure is gradually formed, the Rayleigh scattering is transferred to the Mie scattering since the scale of the ripple structure is at the wavelength.
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页数：3
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