Abstract
Hybridization in the narrow gaps between the surface plasmon polaritons along a metal surface and the localized surface plasmons on metallic nano-objects strongly enhance the electromagnetic field. Here, we employ the plasmonic hybridization to achieve dynamic trapping and manipulation of metallic nano-objects (particle, nanowire) on a flat metal surface. We reveal that the plasmonic hybridization could induce strong trapping forces and torques on a single metallic nano-object, and thus control its position and orientation. Finally we show potential applications of such plasmonic trapping in surface-enhanced Raman scattering and fabrication of lab-on-a-chip plasmonic devices.
© 2015 Optical Society of America
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