Journal
OPTICS EXPRESS
Volume 18, Issue 15, Pages 16005-16013Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.016005
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Funding
- National Science Foundation [DBI 0454324]
- Amgen Scholar Program
- Public Health Service, National Institute of General Medical Sciences [T32 GM07270]
- Fred Hutchinson Cancer Research Center
- Mary Kay Ash Foundation
- NIH [P50 CA83636]
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We propose and demonstrate a purely optical approach to trap and align particles using the interaction of polarized light with periodic nanostructures to generate enhanced trapping force. With a weakly focused laser beam, we observed efficient trapping and transportation of polystyrene beads with sizes ranging from 10 mu m down to 190 nm as well as cancer cell nuclei. In addition, alignment of non-spherical dielectric particles to a 1-D periodic nanostructure was achieved with low laser intensity without attachment to birefringent crystals. Bacterial cells were trapped and aligned with incident optical intensity as low as 17 mu W/mu m(2). (C) 2010 Optical Society of America
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