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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 6 — Jun. 13, 2006

Liquid-core optical ring-resonator sensors

Ian M. White, Hesam Oveys, and Xudong Fan  »View Author Affiliations


Optics Letters, Vol. 31, Issue 9, pp. 1319-1321 (2006)
http://dx.doi.org/10.1364/OL.31.001319


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Abstract

We have demonstrated a novel sensor architecture based on a liquid-core optical ring-resonator (LCORR) in which a fused silica capillary is utilized to carry the aqueous sample and to act as the ring resonator. The wall thickness of the LCORR is controlled to a few micrometers to expose the whispering gallery mode to the aqueous core. Optical characterization with a water–ethanol mixture shows that the spectral sensitivity of the LCORR sensor is approximately 2.6 nm per refractive index unit. A model based on Mie theory is established to explain the experimental results. The LCORR takes advantage of the high sensitivity, small footprint, and low sample consumption with the ring resonator, as well as the efficient fluidic sample delivery with the capillary, and will open an avenue to future multiplexed sensor array development.

© 2006 Optical Society of America

OCIS Codes
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(230.5750) Optical devices : Resonators
(290.4020) Scattering : Mie theory
(300.6320) Spectroscopy : Spectroscopy, high-resolution

ToC Category:
Optical Devices

History
Original Manuscript: December 19, 2005
Revised Manuscript: February 5, 2006
Manuscript Accepted: February 7, 2006

Virtual Issues
Vol. 1, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Ian M. White, Hesam Oveys, and Xudong Fan, "Liquid-core optical ring-resonator sensors," Opt. Lett. 31, 1319-1321 (2006)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-31-9-1319

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