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P‐70: Aligning Properties and Anchoring Strength of Antiferroelectric Liquid Crystals
Author(s) -
Park Won Sang,
Kang JinWoo,
Lee Seo Hern,
Choi Duck Woon,
Kim SungChul,
Kim Jae Chang,
Yoon TaeHoon
Publication year - 2001
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.1831993
Subject(s) - anchoring , rubbing , antiferroelectricity , azimuth , materials science , liquid crystal , optics , polarization (electrochemistry) , composite material , physics , structural engineering , optoelectronics , chemistry , ferroelectricity , dielectric , engineering
Experimentally, the aligned direction of AFLCs in electro‐optic cells having both the substrates rubbed along the same direction, is skewed by a few degrees from their rubbing direction. We propose ‘Torsional Rigid Body Model’ to explain the reason, and interpret their skewing angle as the action of short pitch of AFLCs with an antipolar order where the direction of local polarization alternates between adjacent layers. Several cells have been fabricated for test purposes. Our experimental results indicate that when the azimuthal anchoring strength in the electro‐optic cell is smaller than the maximum shear stress due to short pitch of AFLCs then their layer normal axes are skewed, and the skewing angles become smaller according to a decrease of the surface anchoring strength