Shack-Hartmann multiple-beam optical tweezers
2003; Optica Publishing Group; Volume: 11; Issue: 3 Linguagem: Inglês
10.1364/oe.11.000208
ISSN1094-4087
AutoresPeter John Rodrigo, René Lynge Eriksen, Vincent R. Daria, Jesper Glückstad,
Tópico(s)Digital Holography and Microscopy
ResumoWe 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.
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