Creation of a three-dimensional optical chain for controllable particle delivery
Optics Letters, Vol. 30, Issue 8, pp. 848-850 (2005)
http://dx.doi.org/10.1364/OL.30.000848
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Abstract
We propose a design for producing a conveyable quasi-periodic optical chain that can stably trap and deliver multiple individual particles in three dimensions at different planes near the focus. A diffractive optical element (DOE) is designed to spatially modulate the phase of an incoming radially polarized beam. For a tighly focused beam, a three-dimensional (3D) optical chain can be formed because of the difference in the Gouy phase shift from two concentric regions of the DOE. A desired number of particles can be stably tweezed one by one with individual 3D volumes in this trapping structure. By controlling the phase modulation of the incident beam, one can manipulate the interference pattern to accelerate and transport trapped particles along the optical axis in a prescribed way.
© 2005 Optical Society of America
OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(140.7010) Lasers and laser optics : Laser trapping
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(260.5430) Physical optics : Polarization
Citation
Yiqiong Zhao, Qiwen Zhan, Yanli Zhang, and Yong-Ping Li, "Creation of a three-dimensional optical chain for controllable particle delivery," Opt. Lett. 30, 848-850 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-8-848
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