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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 5, Iss. 12 — Sep. 30, 2010

Nanostructure-enhanced laser tweezers for efficient trapping and alignment of particles

Benjamin K. Wilson, Tim Mentele, Stephanie Bachar, Emily Knouf, Ausra Bendoraite, Muneesh Tewari, Suzie H. Pun, and Lih Y. Lin  »View Author Affiliations

Optics Express, Vol. 18, Issue 15, pp. 16005-16013 (2010)

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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 μm 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 μW/μm2.

© 2010 OSA

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: April 21, 2010
Revised Manuscript: June 9, 2010
Manuscript Accepted: July 6, 2010
Published: July 14, 2010

Virtual Issues
Vol. 5, Iss. 12 Virtual Journal for Biomedical Optics

Benjamin K. Wilson, Tim Mentele, Stephanie Bachar, Emily Knouf, Ausra Bendoraite, Muneesh Tewari, Suzie H. Pun, and Lih Y. Lin, "Nanostructure-enhanced laser tweezers for efficient trapping and alignment of particles," Opt. Express 18, 16005-16013 (2010)

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