A full-aperture design of phase mask is proposed and implemented to produce concentric optical-vortex traps. The radius of the focused optical vortex can be controlled by the radial modulation of the phase mask.
© 2008 The Optical Society
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.7010) Atomic and molecular physics : Laser trapping
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3300) Lasers and laser optics : Laser beam shaping
J. Lin and X. Yuan, "Concentric Optical-Vortex Traps Generated by Reducing Sidelobes of Optical Vortices," in Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, OSA Technical Digest (CD) (Optical Society of America, 2008), paper FTuF5.