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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 16 — Jul. 30, 2012
  • pp: 17348–17358

Optofluidic particle manipulation in a liquid-core/liquid-cladding waveguide

Kang Soo Lee, Sang Youl Yoon, Kyung Heon Lee, Sang Bok Kim, Hyung Jin Sung, and Sang Soo Kim  »View Author Affiliations

Optics Express, Vol. 20, Issue 16, pp. 17348-17358 (2012)

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This paper describes a method for particle manipulation in a liquid-core/liquid-cladding optical waveguide system. Step-index and graded-index waveguides were modeled with consideration for, respectively, miscible and immiscible core and cladding fluids. The characteristic motions of four different particles with refractive indices of 1.59, 1.48, 1.37, and 1.22 were examined. The guided beam was assumed to be Gaussian in shape. Our results showed that high-refractive-index particles converged at the center of the core fluid due to a positive gradient force, whereas low-refractive-index particles converged at the flow periphery. The nonlinearity of the particle motion increased as the flow velocity and the guided beam waist decreased and the laser power and the particle size increased. The initial beam waist of the guided beam in the graded-index waveguide did not significantly affect the characteristics of the particle motion due to the effects of diffusion.

© 2012 OSA

OCIS Codes
(080.2740) Geometric optics : Geometric optical design
(230.7370) Optical devices : Waveguides
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Physical Optics

Original Manuscript: May 15, 2012
Revised Manuscript: July 4, 2012
Manuscript Accepted: July 6, 2012
Published: July 16, 2012

Virtual Issues
Vol. 7, Iss. 9 Virtual Journal for Biomedical Optics

Kang Soo Lee, Sang Youl Yoon, Kyung Heon Lee, Sang Bok Kim, Hyung Jin Sung, and Sang Soo Kim, "Optofluidic particle manipulation in a liquid-core/liquid-cladding waveguide," Opt. Express 20, 17348-17358 (2012)

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