Abstract

We propose that a tapered photonic crystal waveguide design can unify optical trapping and transport functionalities to advance the controllability of optical manipulation. Subwavelength particles can be trapped by a resonance-enhanced field and transported to a specified position along the waveguide on demand by varying the input wavelength. A simulated transport ability as high as 148 (transport distance/wavelength variation) is obtained by the waveguide with 0.1° tilted angle. Stable trapping of a 50nm polystyrene particle can be achieved with input power of 7mW. We anticipate that this design would be beneficial for future life science research and optomech anical applications.

© 2011 Optical Society of America

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