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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 10 — May. 15, 2012
  • pp: 1739–1741

Microfluidic sorting with blinking optical traps

R. Dasgupta, R. S. Verma, and P. K. Gupta  »View Author Affiliations


Optics Letters, Vol. 37, Issue 10, pp. 1739-1741 (2012)
http://dx.doi.org/10.1364/OL.37.001739


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Abstract

It is shown that by appropriately choosing the periodicity of a blinking optical trap only larger sized colloidal spheres can be selectively trapped out of a mixed population. This happens because smaller sized, more agile, spheres escape out of the trap volume during the off period of the trap beam. Therefore, by scanning an array of blinking traps over a mixed sample, bigger spheres can be forced to move with the traps and eventually could be taken to the output side. Experimental demonstration of sorting between 1 µm and 2 µm diameter silica spheres is presented.

© 2012 Optical Society of America

OCIS Codes
(170.0180) Medical optics and biotechnology : Microscopy
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: March 1, 2012
Revised Manuscript: March 30, 2012
Manuscript Accepted: March 30, 2012
Published: May 15, 2012

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

Citation
R. Dasgupta, R. S. Verma, and P. K. Gupta, "Microfluidic sorting with blinking optical traps," Opt. Lett. 37, 1739-1741 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-10-1739


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