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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 6 — Jun. 13, 2007

Miniaturized high-NA focusing-mirror multiple optical tweezers

Fabrice Merenda, Johann Rohner, Jean-Marc Fournier, and René-Paul Salathé  »View Author Affiliations

Optics Express, Vol. 15, Issue 10, pp. 6075-6086 (2007)

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An array of high numerical aperture parabolic micromirrors (NA = 0.96) is used to generate multiple optical tweezers and to trap micron-sized dielectric particles in three dimensions within a fluidic device. The array of micromirrors allows generating arbitrarily large numbers of 3D traps, since the whole trapping area is not restricted by the field-of-view of the high-NA microscope objectives used in traditional tweezers arrangements. Trapping efficiencies of Qmax r ≃ 0.22, comparable to those of conventional tweezers, have been measured. Moreover, individual fluorescence light from all the trapped particles can be collected simultaneously with the high-NA of the micromirrors. This is demonstrated experimentally by capturing more than 100 fluorescent micro-beads in a fluidic environment. Micromirrors may easily be integrated in microfluidic devices, offering a simple and very efficient solution for miniaturized optical traps in lab-on-a-chip devices.

© 2007 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(170.1530) Medical optics and biotechnology : Cell analysis
(350.3950) Other areas of optics : Micro-optics

ToC Category:

Original Manuscript: March 8, 2007
Revised Manuscript: April 25, 2007
Manuscript Accepted: April 27, 2007
Published: May 2, 2007

Virtual Issues
Vol. 2, Iss. 6 Virtual Journal for Biomedical Optics

Fabrice Merenda, Johann Rohner, Jean-Marc Fournier, and René-Paul Salathé, "Miniaturized high-NA focusing-mirror multiple optical tweezers," Opt. Express 15, 6075-6086 (2007)

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