Single-beam optical gradient force traps created by focusing helical modes of light are known as optical vortices. Modulating the helical pitch of such a mode’s wave front yields a new class of optical traps whose dynamically reconfigurable intensity distributions provide new opportunities for controlling motion in mesoscopic systems. An implementation of modulated optical vortices based on the dynamic holographic optical tweezer technique is described.
© 2003 Optical Society of America
(090.1760) Holography : Computer holography
(140.7010) Lasers and laser optics : Laser trapping
(350.3850) Other areas of optics : Materials processing
(350.5030) Other areas of optics : Phase
Jennifer E. Curtis and David G. Grier, "Modulated optical vortices," Opt. Lett. 28, 872-874 (2003)