José A. Rodrigo and Tatiana Alieva
We show that a freestyle laser trap, including high-intensity and phase gradient forces along arbitrary curves, is able to confine multiple particles and drive their motion with the ability to speed them up or slow them down. This Letter reports, for first time, to the best of our knowledge, how such a trap can be experimentally created deep within the sample to construct rotating colloidal motors and study collective particle dynamics in distinct configurations. This new laser tool opens up promising perspectives in the study of hydrodynamics and optofluidics at the microscale.
DOI
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