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 Λ, the array period can be either Λ or 2Λ. An external voltage enables to switch the spatial periodicity of the defect lines from 2Λ to Λ and also to control their shape and location. A modeling of the observed twisted arrangements is reported.
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