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Manipulating forces in optical vortex using plasmonic bumpsFormat | Member Price | Non-Member Price |
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Paper Abstract
In this paper, small plasmonic nanobumps, which consist of metal/dielectric layers are placed on the ring of optical
vortex to enhance electric field ampltiude. In this paper, a plasmonic nanobump is placed on the ring of smaller optical
vortex. The smaller optical vortex form from the resultant topological phase between the handedness of the incident
circular polarized light and the nanoslits spiral. Different designs of plasmonic nanobump are investigated, and tapered
nanobump produced higher field enhancement due to higher surface charge density at the tapering end. Higher field
intensity at the tip of the plasmonic nanobump produces lower potential, which attract nanoparticle to the region. The
optical force increases by the square of the electric field amplitude. This high electric field intensity at the plasmonic
nanobump functions as attractive node, which trap molecules inside the optical vortex. Additional plasmonic nanobumps
are added onto the other locations of the optical vortex to manipulate the particle trapping positions. This allows the
precise control of molecule’s position and movement for imaging, characterization and analysis, which is useful for
mobile lab-on-chip devices.
Paper Details
Date Published: 10 October 2012
PDF: 9 pages
Proc. SPIE 8458, Optical Trapping and Optical Micromanipulation IX, 84581U (10 October 2012); doi: 10.1117/12.929330
Published in SPIE Proceedings Vol. 8458:
Optical Trapping and Optical Micromanipulation IX
Kishan Dholakia; Gabriel C. Spalding, Editor(s)
PDF: 9 pages
Proc. SPIE 8458, Optical Trapping and Optical Micromanipulation IX, 84581U (10 October 2012); doi: 10.1117/12.929330
Show Author Affiliations
E. H. Khoo, A*STAR Institute of High Performance Computing (Singapore)
I. Ahmed, A*STAR Institute of High Performance Computing (Singapore)
I. Ahmed, A*STAR Institute of High Performance Computing (Singapore)
M. T. W. Ang, A*STAR Institute of High Performance Computing (Singapore)
E. P. Li, A*STAR Institute of High Performance Computing (Singapore)
E. P. Li, A*STAR Institute of High Performance Computing (Singapore)
Published in SPIE Proceedings Vol. 8458:
Optical Trapping and Optical Micromanipulation IX
Kishan Dholakia; Gabriel C. Spalding, Editor(s)
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