Journal
OPTICS EXPRESS
Volume 15, Issue 18, Pages 11629-11639Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.15.011629
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Semiconducting nanowires, such as ZnO and Si, are used in the fields of nanophotonics and nanoelectronics. Optical tweezers offer the promise of flexible positional control of such particles in a liquid, but so far this has been limited to either manipulation close to the surface, or to axial trapping of nanowires. We show the three-dimensional trapping of ZnO and silica-coated Si nanowires in counter-propagating line tweezers, and demonstrate translational and rotational in-plane manipulation, away from the surfaces. The high-refractive index particles investigated-ZnO wires (n similar to 1.9) with varying lengths up to 20 mu m and 6-mu m-long silica-coated Si wires (n = 3.6) - could not be trapped in single-beam line traps. Opposite surface charges are used to fix the nanowires to a surface. Full translational and in-plane rotational control of semiconducting nanowires expands the possibilities to position individual wires in complex geometries significantly. (c) 2007 Optical Society of America.
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