title: Tunable optical vortex arrays from a single nematic topological defect.
abstract: We report on the generation of tunable structured light fields endowed with various sets of phase singularities from a single topological defect in a nematic liquid crystal mesophase. The experimental demonstration relies on the use of electric field-induced nonsingular topological defects called "umbilics."
authors.affiliation: Université Bordeaux, LOMA, UMR 5798, F-33400 Talence, France. e.brasselet@loma.u-bordeaux1.fr
authors.forename: Etienne
authors.initials: E
authors.lastname: Brasselet