title: Generating switchable and reconfigurable optical vortices via photopatterning of liquid crystals.
abstract: Liquid-crystal fork gratings are demonstrated through photopatterning realized on a DMD-based microlithography system. This supplies a new strategy for generating fast switchable, reconfigurable, wavelength-tolerant and polarization-insensitive optical vortices. The technique has great potential in broad fields such as OAM-based quantum computations, optical communications, and micromanipulation.
authors.affiliation: National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China.
authors.forename: Bing-yan
authors.initials: BY
authors.lastname: Wei
authors.forename: Wei
authors.initials: W
authors.lastname: Hu
authors.forename: Yang
authors.initials: Y
authors.lastname: Ming
authors.forename: Fei
authors.initials: F
authors.lastname: Xu
authors.forename: Sam
authors.initials: S
authors.lastname: Rubin
authors.forename: Jian-guo
authors.initials: JG
authors.lastname: Wang
authors.forename: Vladimir
authors.initials: V
authors.lastname: Chigrinov
authors.forename: Yan-qing
authors.initials: YQ
authors.lastname: Lu
keywords: liquid crystals; microlithography; microstructures; photoalignment