Plasmonic optical trap having very large active volume realized with nano-ring structure
Shum, Perry Ping
Date of Issue2012
School of Electrical and Electronic Engineering
The feasibility of using gold nano-rings as plasmonic nano-optical tweezers is investigated. We found that at a resonant wavelength of λ=785 nm , the nano-ring produces a maximum trapping potential of ∼32k B T on gold nanoparticles. The existence of multiple potential wells results in a very large active volume of ∼10 6 nm 3 for trapping the target particles. The report nano-ring design provides an effective approach for manipulating nano-objects in very low concentration into the high-field region and is well suited for integration with microfluidics for lab-on-a-chip applications.
DRNTU::Engineering::Electrical and electronic engineering
© 2012 Optical Society of America. This paper was published in Optics Letters and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following official DOI: [http://dx.doi.org/10.1364/OL.37.001748]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.