title: Dark and antidark diffraction-free beams.
abstract: We present dark and antidark diffraction-free beams and discuss their properties. We show that all such beams must be partially spatially coherent. The new beams can be used for optical trapping of atoms.
authors.affiliation: Department of Electrical and Computer Engineering, Dalhousie University, Halifax, Nova Scotia, B3J 2X4, Canada. serpo@dal.ca
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Ponomarenko
authors.forename: Weihong
authors.initials: W
authors.lastname: Huang
authors.forename: Michael
authors.initials: M
authors.lastname: Cada