title: Optical vortex trapping of particles.
abstract: We demonstrate three-dimensional trapping of low-index particles (20-microm-diameter hollow glass spheres in water) by using a single, strongly focused, stationary dark optical vortex laser beam. The holographically generated vortex, which is similar to a TEM(01)* mode beam, was also used to trap and form ring patterns of high-index particles.
authors.forename: K T
authors.initials: KT
authors.lastname: Gahagan
authors.forename: G A
authors.initials: GA
authors.lastname: Swartzlander