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  • December 2009

Optics InfoBase > Spotlight on Optics > Increasing trap stiffness with position clamping in holographic optical tweezers


Increasing trap stiffness with position clamping in holographic optical tweezers

Published in Optics Express, Vol. 17 Issue 25, pp.22718-22725 (2009)
by Daryl Preece, Richard Bowman, Anna Linnenberger, Graham Gibson, Steven Serati, and Miles Padgett

Source article Abstract | Full Text: PDF


Spotlight summary: A closed-loop holographic optical tweezers system capable of manipulating multiple particles in three dimensions is reported. A spatial light modulator with a refresh rate of 203 Hz generates the optical trap, so that feedback from a camera can be used to modify the optical trap in response to the particles' motion. This active trap correction can lead to a reduction of more than 40% in the variance of the particles' position, as shown by experiments in which as many as three, 5-┬Ám beads were trapped.

Technical Division: Optoelectronics
ToC Category: Optical Trapping and Manipulation
OCIS Codes: (120.4640) Instrumentation, measurement, and metrology : Optical instruments
(140.7010) Lasers and laser optics : Laser trapping
(230.6120) Optical devices : Spatial light modulators
(350.4855) Other areas of optics : Optical tweezers or optical manipulation


Posted on December 07, 2009

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