Multidimensional optical fractionation of colloidal particles with holographic verification.
@article{Xiao2010MultidimensionalOF, title={Multidimensional optical fractionation of colloidal particles with holographic verification.}, author={Ke Xiao and D. Grier}, journal={Physical review letters}, year={2010}, volume={104 2}, pages={ 028302 } }
The trajectories of colloidal particles driven through a periodic potential energy landscape can become kinetically locked-in to directions dictated by the landscape's symmetries. When the landscape is realized with a structured light field, the path a given particle follows has been predicted to depend exquisitely sensitively on such properties as the particle's size and refractive index. We confirm these predictions by measuring the transport of colloidal silica spheres through arrays of… CONTINUE READING
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