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29 Dec 2008

Volume 93, Issue 26, Articles (26xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 93, 261101 (2008); http://dx.doi.org/10.1063/1.3053074 (3 pages)

Takashi Fujikura, Osamu Matsuda, Dieter M. Profunser, Oliver B. Wright, Jeremy Masson, and Sylvain Ballandras
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Large-angular separation of particles induced by cascaded deflection angles in optical sorting

X.-C. Yuan, S. W. Zhu, J. Bu, Y. Y. Sun, J. Lin, and Bruce Z. Gao

Appl. Phys. Lett. 93, 263901 (2008); http://dx.doi.org/10.1063/1.3040697 (3 pages) | Cited 1 time

Online Publication Date: 30 December 2008

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Show Abstract
A composite microlens array (MLA) with two cascaded guiding axes has been fabricated to achieve a large lateral separation of an object with different refractive indices or sizes. The MLA projects a composite pattern formed by its focal spots into a microchamber for optical sorting in a microscopic system. This approach enables passive, high power, efficient, and continuous microfluidic sorting without requiring complicated optical assembly. Separation of particles with different refractive indices to a lateral angle of 40° is experimentally demonstrated with moderate laser power.
Show PACS
42.79.Bh Lenses, prisms and mirrors
47.85.Np Fluidics
47.61.-k Micro- and nano- scale flow phenomena
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