We report long-range optical binding of multiple polystyrene nanoparticles (100-600 nm in diameter) at fixed interparticle distances that match multiples of the half-beat-lengths between the lowest order modes of a hollow-core photonic crystal fiber. Analysis suggests that each nanoparticle converts the incoming optical mode into a superposition of co-propagating modes, within the beat pattern of which further particles can become trapped. Strikingly, the entire particle arrangement can be moved over a distance of several cm, without changing the inter-particle spacing, by altering the ratio of backward-to-forward optical power. Potential applications are in multi-dimensional nanoparticle-based quantum optomechanical systems.
Dmitry S. Bykov, Richard Zeltner, Tijmen G. Euser, Shangran Xie, and Philip St. J. Russell, "Long-range optical binding in a hollow-core photonic crystal fiber using higher order modes," Proc. SPIE 9922, Optical Trapping and Optical Micromanipulation XIII, 99221X (Presented at SPIE Nanoscience + Engineering: September 01, 2016; Published: 12 October 2016); https://doi.org/10.1117/12.2236648.
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