Journal
OPTICS EXPRESS
Volume 19, Issue 8, Pages 7680-7688Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.007680
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We report the use of Laguerre-Gaussian (LG) modes for controlled orientation and rotation of optically trapped red blood cells (RBCs). For LG modes with increasing topological charge the resulting increase in size of the intensity annulas led to trapping of the cells at larger tilt angle with respect to the beam axis and thus provided additional control on the stable orientation of the cells under trap. Further, the RBCs could also be driven as micro-rotors by a transfer of orbital angular momentum from the LG trapping beam having large topological charge or by rotating the profile of LG mode having fractional topological charge. (C) 2011 Optical Society of America
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