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Optics Letters

Optics Letters


  • 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)

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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

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

R. Dasgupta, R. S. Verma, and P. K. Gupta, "Microfluidic sorting with blinking optical traps," Opt. Lett. 37, 1739-1741 (2012)

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  1. H. Andersson and A. van den Berg, Sens. Actuators B 92, 315 (2003). [CrossRef]
  2. K. Ladavac, K. Kasza, and D. G. Grier, Phys. Rev. E 70, 010901 (2004). [CrossRef]
  3. M. P. MacDonald, G. C. Spalding, and K. Dholakia, Nature 426, 421 (2003). [CrossRef]
  4. G. Milne, D. Rhodes, M. MacDonald, and K. Dholakia, Opt. Lett. 32, 1144 (2007). [CrossRef]
  5. R. L. Smith, G. C. Spalding, K. Dholakia, and M. P. MacDonald, J. Opt. A 9, S134 (2007). [CrossRef]
  6. L. Paterson, E. Papagiakoumou, G. Milne, V. Garcés-Chávez, S. A. Tatarkova, W. Sibbett, F. J. Gunn-Moore, P. E. Bryant, A. C. Riches, and K. Dholakia, Appl. Phys. Lett. 87, 123901 (2005). [CrossRef]
  7. T. Čižmár, M. Šiler, M. Šerý, P. Zemánek, V. Garcés-Chávez, and K. Dholakia, Phys. Rev. B 74, 035105 (2006). [CrossRef]
  8. I. Ricárdez-Vargas, P. Rodríguez-Montero, R. Ramos-Garcíaa, and K. Volke-Sepúlvedaa, Appl. Phys. Lett. 88, 121116 (2006). [CrossRef]
  9. P. Jakl, T. Čižmár, M. Šerý, and P. Zemánek, Appl. Phys. Lett. 92, 161110 (2008). [CrossRef]
  10. H. C. Berg, Random Walks in Biology (Princeton University, 1993).
  11. J. Gelles, B. J. Schnapp, and M. P. Sheetz, Nature 331, 450 (1988). [CrossRef]
  12. P. Schiro, C. DuBois, and A. Kwok, Opt. Express 11, 3485 (2003). [CrossRef]

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