Simultaneous rotation, orientation and displacement control of birefringent microparticles in holographic optical tweezers

We report the experimental implementation of a new method for generating multiple dynamical optical tweezers, where each one of them is generated with an independent linear polarization state with arbitrary orientation. This also allows an independent simultaneous polarization-rotation control. The...

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Bibliographic Details
Published in:Optics express 2013-01, Vol.21 (1), p.102-111
Main Authors: Arias, A, Etcheverry, S, Solano, P, Staforelli, J P, Gallardo, M J, Rubinsztein-Dunlop, H, Saavedra, C
Format: Article
Language:English
Subjects:
Algorithms
Biophysics - methods
Birefringence
Dimerization
DNA - chemistry
Equipment Design
Holography - instrumentation
Holography - methods
Liquid Crystals
Optical Tweezers
Optics and Photonics - methods
Particle Size
Rotation
Stress, Mechanical
Ultraviolet Rays
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Summary:We report the experimental implementation of a new method for generating multiple dynamical optical tweezers, where each one of them is generated with an independent linear polarization state with arbitrary orientation. This also allows an independent simultaneous polarization-rotation control. The laser beam, both for generating multiple traps and polarization control, has been modulated using a single reflective nematic liquid crystal with parallel alignment. We present experimental results of controlled displacement, orientation and rotation of birefringent particles. In addition, a simple method for estimating and canceling out the primary astigmatism present in the system is presented.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.000102