Employing nematic liquid crystals in a homeotropic cell with a photosensitive wall, dissipative vortex pairs are selectively induced by external illumination and the interaction law is characterized for pairs of opposite topological charges. Contrary to the phenomenological fit with a force inversely proportional to the distance, the data provide evidence that nonlinear mobility effects must be taken into account. The observations lead to a reconciliation of experiments with theory. © IOP Publishing and Deutsche Physikalische Gesellschaft.

Characterization of the vortex-pair interaction law and nonlinear mobility effects

Residori, Stefania
2013-01-01

Abstract

Employing nematic liquid crystals in a homeotropic cell with a photosensitive wall, dissipative vortex pairs are selectively induced by external illumination and the interaction law is characterized for pairs of opposite topological charges. Contrary to the phenomenological fit with a force inversely proportional to the distance, the data provide evidence that nonlinear mobility effects must be taken into account. The observations lead to a reconciliation of experiments with theory. © IOP Publishing and Deutsche Physikalische Gesellschaft.
optics; liquid crystals; vortices
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/903215
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