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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 2 — Jan. 16, 2012
  • pp: 1292–1300

Particle separation in fluidic flow by optical fiber

Hongxiang Lei, Yao Zhang, and Baojun Li  »View Author Affiliations


Optics Express, Vol. 20, Issue 2, pp. 1292-1300 (2012)
http://dx.doi.org/10.1364/OE.20.001292


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Abstract

We report a separation of two different size particles in fluidic flow by an optical fiber. With a light of 1.55 μm launched into the fiber, particles in stationary water were massively trapped and assembled around the fiber by a negative photophoretic force. By introducing a fluidic flow, the assembled particles were separated into two different downstream positions according to their sizes by the negative photophoretic force and the dragging force acted on the particles. The intensity distribution of light leaked from the fiber and the asymmetry factor of energy distribution have been analysed as crucial factors in this separation. Poly(methyl methacrylate) particles (5-/10-μm diameter), SiO2 particles (2.08-/5.65-μm diameter), and SiO2 particles (2.08-μm diameter) mixed with yeast cells were used to demonstrate the effectiveness of the separation. The separation mechanism has also been numerical simulated and theoretical interpreted.

© 2012 OSA

OCIS Codes
(350.5340) Other areas of optics : Photothermal effects
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

History
Original Manuscript: November 21, 2011
Revised Manuscript: December 19, 2011
Manuscript Accepted: December 20, 2011
Published: January 5, 2012

Virtual Issues
Vol. 7, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Hongxiang Lei, Yao Zhang, and Baojun Li, "Particle separation in fluidic flow by optical fiber," Opt. Express 20, 1292-1300 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-2-1292


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