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OPTICS EXPRESS
Volume 11, Issue 3, Pages 208-214Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.11.000208
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We introduce a new method for generating an array of programmable optical tweezers based on the principle of the Shack-Hartmann wave front sensor. In this approach, a lenslet array divides a laser beam into multiple point sources that are subsequently imaged onto the sample plane of an inverted microscope. This results in a matrix of tightly focused beams used for local confinement and manipulation of micron-sized dielectric particles in an aqueous solution. Using a spatial light-modulating device, the phase profile of the laser beam is computer-encoded providing for controlled spatial deflections of the trapping beams. (C) 2003 Optical Society of America.
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