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Proceedings Paper

Vertical plasmonic nanowires for 3D nanoparticle trapping
Author(s): Jingzhi Wu; Xiaosong Gan
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Paper Abstract

Nanoparticle trapping is considered to be more challenging than trapping micron-sized objects because of the diffraction limit of light and the severe Brownian motion of the nanoparticles. We introduce a nanoparticle trapping approach based on plasmonic nanostructures, which consist of nanopillars with high aspect ratio. The plasmonic nanopillars behave as plasmonic resonators that rely on paired nano-pillars supporting gap plasmon modes. The localized surface plasmon resonance effect provides strong electromagnetic field enhancement and enables confinement of nanoparticles in three dimensional space. Numerical simulations indicate that the plasmonic structure provides stronger optical forces for trapping nanoparticles. The study of thermal effect of the plasmonic structure shows that the impact of the thermal force is significant, which may determine the outcome of the nanoparticle trapping.

Paper Details

Date Published: 23 December 2011
PDF: 6 pages
Proc. SPIE 8204, Smart Nano-Micro Materials and Devices, 82040T (23 December 2011);
Show Author Affiliations
Jingzhi Wu, Swinburne Univ. of Technology (Australia)
Xiaosong Gan, Swinburne Univ. of Technology (Australia)

Published in SPIE Proceedings Vol. 8204:
Smart Nano-Micro Materials and Devices
Saulius Juodkazis; Min Gu, Editor(s)

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