Open AccessTheoretical approximation study on the helix structure of ferroelectric liquid crystal
Author(s) -
Xiaolu Tang,
Xubing Lu,
Zhihang Peng,
Y G Liu,
Xuan Li
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.4001
Subject(s) - liquid crystal , ferroelectricity , helix (gastropod) , materials science , refractive index , phase (matter) , computation , optics , crystal (programming language) , molecule , condensed matter physics , crystallography , physics , optoelectronics , chemistry , quantum mechanics , mathematics , computer science , algorithm , programming language , ecology , snail , dielectric , biology
The expressions of average refractive index in a helix pitch of ferroelectric liquid crystalFLC were derived by theoretical approximation computation of the helix structure at chiral smectic C phase of FLC. A conclusion that FLC molecules in a helix pitch as a whole can be considered as a model of nematic liquid crystal in terms of the expressions of average refractive index was obtained. When the thickness of FLC with a vertical alignment along the helical axis is integer times long as the helix pitch, FLC molecules can be considered as a group composed of nematic liquid crystal models. The comparisons of experiment results of ZLI-3654 FLC with 5CB nematic liquid crystal confirmed the above conclusion. The theory and experiment are in good agreement. Theoretical guidance and a deeper understanding can be provided by this theory for preparation of deformed helix FLC and vertical alignment deformed helix FLC devices, as well as application of ferroelectric liquid crystal.