Physical mechanism for in-plane molecular orientation in polymer-dispersed ferroelectric liquid crystals.
The physical mechanism of liquid crystal (LC) alignment in ferroelectric LC (FLC) droplets dispersed in a photocurable polymer matrix was studied. The orientational ordering of both FLC molecules and the polymer matrix was induced by a rubbed polyimide alignment layer. There existed an optimum FLC droplet size for the production of uniformly oriented molecules and smectic layers for maximum electro-optic modulation. The alignment quality was critically dependent on the droplet size, shape, the helical pitch, and the phase transition sequence of the FLCs. The molecular structure formed inside the FLC droplets resulted from a delicate balance between the elastic energy stored in a restricted geometry and surface interactions at the FLC-polymer interface.
Jin
Min Young
MY
Department of Electronics and Computer Engineering, Hanyang University, Seoul 133-791, Korea.
Lee
You-Jin
YJ
Lee
Kyehun
K
Lee
Sin-Doo
SD
Kim
Jae-Hoon
JH