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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 14 — Jul. 15, 2008
  • pp: 1623–1625

Photonic crystal resonator integrated in a microfluidic system

P. S. Nunes, N. A. Mortensen, J. P. Kutter, and K. B. Mogensen  »View Author Affiliations

Optics Letters, Vol. 33, Issue 14, pp. 1623-1625 (2008)

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We report on a novel optofluidic system consisting of a silica-based 1D photonic crystal, integrated planar waveguides, and electrically insulated fluidic channels. An array of pillars in a microfluidic channel designed for electrochromatography is used as a resonator for on-column label-free refractive index detection. The resonator was fabricated in a silicon oxynitride platform, to support electro-osmotic flow, and operated at λ = 1.55 μ m . Different aqueous solutions of ethanol with refractive indices ranging from n=1.3330 to 1.3616 were pumped into the column/resonator, and the transmission spectra were recorded. Linear shifts of the resonant wavelengths yielded a maximum sensitivity of Δ λ Δ n = 480 nm /RIU (refractive index unit), and a minimum difference of Δ n = 0.007 RIU was measured.

© 2008 Optical Society of America

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Lasers and Laser Optics

Original Manuscript: May 6, 2008
Revised Manuscript: June 18, 2008
Manuscript Accepted: June 8, 2008
Published: July 14, 2008

Virtual Issues
Vol. 3, Iss. 8 Virtual Journal for Biomedical Optics

P. S. Nunes, N. A. Mortensen, J. P. Kutter, and K. B. Mogensen, "Photonic crystal resonator integrated in a microfluidic system," Opt. Lett. 33, 1623-1625 (2008)

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