Defect lines arrays are created in liquid crystal exploiting periodic arrangements of twisted domains with opposite handedness. The defect lines self-organize in a planar cell guided by a polarization hologram recorded in one aligning substrate that provides planar periodic alignment. Depending on the relationship between the cell thickness d and the hologram pitch Lambda, the array period can be either Lambda or 2 Lambda. An external voltage enables to switch the spatial periodicity of the defect lines from 2 Lambda to Lambda and also to control their shape and location. A modeling of the observed twisted arrangements is reported.

Periodic defects lines in liquid crystal cell guided by polarization holograms at an aligning surface

PAGLIUSI, Pasquale;Provenzano C;CIPPARRONE, Gabriella
2013-01-01

Abstract

Defect lines arrays are created in liquid crystal exploiting periodic arrangements of twisted domains with opposite handedness. The defect lines self-organize in a planar cell guided by a polarization hologram recorded in one aligning substrate that provides planar periodic alignment. Depending on the relationship between the cell thickness d and the hologram pitch Lambda, the array period can be either Lambda or 2 Lambda. An external voltage enables to switch the spatial periodicity of the defect lines from 2 Lambda to Lambda and also to control their shape and location. A modeling of the observed twisted arrangements is reported.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/148866
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