Anchoring properties of substrate with a grating surface |
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| Authors: | Ye Wen-Jiang Xing Hong-Yu and Yang Guo-Chen |
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| Affiliation: | School of Sciences, Hebei University of Technology, Tianjin 300130, China |
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| Abstract: | The anchoring properties of substrate with a grating surface are
investigated analytically. The alignment of nematic liquid
crystal (NLC) in a grating surface originates from two
mechanisms, thus the anchoring energy consists of two parts. One
originates from the interaction potential between NLC molecules
and the molecules on the substrate surface, and the other stems
from the increased elastic strain energy. Based on the two
mechanisms, the expression of anchoring energy per unit area of
a projected plane of this grating surface is deduced and called
the equivalent anchoring energy formula. Both the strength and
the easy direction of equivalent anchoring energy are a function
of the geometrical parameters (amplitude and pitch) of a grating
surface. By using this formula, the grating surface can be
replaced by its projected plane and its anchoring properties can
be described by the equivalent anchoring energy formula. |
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| Keywords: | anchoring properties anchoring
energy elastic strain energy equivalent anchoring energy
formula |
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