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Thursday, September 15, 2011

Controlling ghost traps in holographic optical tweezers

Christina Hesseling, Mike Woerdemann, Andreas Hermerschmidt, and Cornelia Denz

Computer-generated holograms displayed by phase-modulating spatial light modulators have become a well-established tool for beam shaping purposes in holographic optical tweezers. Still, the generation of light intensity patterns with high spatial symmetry and simultaneously without interfering ghost traps is a challenge. We have implemented an iterative Fourier transform algorithm that is capable of controlling these ghost traps and demonstrate the benefit of this approach in the experiment.

DOI

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