Bryan J. Black and Samarendra K. Mohanty
Methods of controllable, noncontact rotation of optically trapped microscopic objects have garnered significant attention for tomographic imaging and microfluidic actuation. Here, we report development of a fiber-optic spanner and demonstrate controlled rotation of smooth muscle cells. The rotation is realized by introducing a transverse offset between two counterpropagating beams emanating from single-mode optical fibers. The rotation speed and surrounding microfluidic flow could be controlled by varying balanced laser beam powers. Further, we demonstrate simultaneous translation and rotation of the fiber-optically trapped cell by varying the laser power of one fiber-optic arm.
DOI
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