title: Electro-optic vortex-producing lenses using spiral-shaped ferroelectric domains.
abstract: We present electrically controlled wavefront modulators that simultaneously focus and introduce vorticity to an incident beam. These modulators are made out of spiral-shaped 180 degrees ferroelectric domains in lithium niobate; they have a virtually instantaneous response time, withstand high power and can be used throughout the transparency region of the material (0.4 - 5 microm).
authors.affiliation: División de Física Aplicada, Centro de Investigación Científica y de Educación Superior de Ensenada, Apdo. Postal 2732, Ensenada, B.C, C.P. 22860, Mexico. rcudney@cicese.mx
authors.forename: R S
authors.initials: RS
authors.lastname: Cudney
authors.forename: H M
authors.initials: HM
authors.lastname: Escamilla
authors.forename: L A
authors.initials: LA
authors.lastname: Ríos