Structured, photosensitive PVK and PVCN polymer layers for control of liquid crystal alignment

被引：12

作者：

Kaczmarek, M ^{[1
]}

Dyadyusha, A ^{[1
]}

机构：

[1] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England

来源：

JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS | 2003年 / 12卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

optics at surfaces; liquid crystals; photoconductive materials; polymers; microstructure fabrication;

D O I：

10.1142/S021886350300164X

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present characteristics of liquid crystal reorientation in cells with alignment layers made of different poly (vinyl)-type polymers. Mechanically-rubbed poly(N-vinyl carbazole) (PVK) produces planar alignment of liquid crystals with easy axis orthogonal to the rubbing direction and zero pretilt angle. Doping PVK with C-60 makes this liquid crystal-polymer system extremely photosensitive for visible wavelengths. Illumination with a Gaussian beam reveals a complex structure of patterns of reoriented liquid crystal molecules. Using poly (vinyl-cinnamate) (PVCN), exposed to UV light, a periodic alignment of liquid crystals can be achieved via this all-optical method.

引用

页码：547 / 555

页数：9

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