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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 11 — Jun. 1, 2010
  • pp: 1890–1892

Microfluidic droplet grating for reconfigurable optical diffraction

J. Q. Yu, Y. Yang, A. Q. Liu, L. K. Chin, and X. M. Zhang  »View Author Affiliations

Optics Letters, Vol. 35, Issue 11, pp. 1890-1892 (2010)

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This Letter presents a reconfigurable optical diffraction grating using multiphase droplets on a microfluidic chip. The uniform and evenly spaced circular droplets are generated by continuously dispersing two immiscible liquids into a T junction to produce plugs, which are then transformed into a circular shape at a sudden expansion of the microchannel. In experiments, the droplet grating shows a detection limit of ~ 6.3 × 10 5 when used as an optofluidic refractometer and produces different colors as a color filter. Such a grating has the advantages of high stability and wide tunability in droplet size, grating period, and refractive index, making it promising for biochemical and biomaterial applications.

© 2010 Optical Society of America

OCIS Codes
(230.1950) Optical devices : Diffraction gratings
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Diffraction and Gratings

Original Manuscript: March 5, 2010
Revised Manuscript: April 20, 2010
Manuscript Accepted: April 25, 2010
Published: May 27, 2010

Virtual Issues
Vol. 5, Iss. 10 Virtual Journal for Biomedical Optics

J. Q. Yu, Y. Yang, A. Q. Liu, L. K. Chin, and X. M. Zhang, "Microfluidic droplet grating for reconfigurable optical diffraction," Opt. Lett. 35, 1890-1892 (2010)

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