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Dependence of phase retardation on applied voltage for a sample cell before UV exposure and (inset picture) calculated Gibbs free energy for splay, -twist, and bend states of LC alignment in the same sample.
(a) Dependence of phase retardation on UV exposure time and (b) microscopy images of samples A–C, as indicated in (a), between crossed polarizers. R: rubbing direction; dashed line (---⋅): transmission axes of polarizers; dashed-dotted line (-⋅-⋅-): boundary between electrode and nonelectrode areas.
(a) Comparing the measured curve of our -twisted cell with those calculated for the -twist states of a pi cell pretilted at and . (b) Tilt and azimuth angles of LC directors deviated from the rubbing direction in various positions within the cell pretilted at .
curves of a -twisted cell, a no-bias cell, a chiral-doped cell, and a conventional pi cell (inset picture).
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