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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 8 — Apr. 15, 2008
  • pp: 788–790

Rapid chemical-vapor sensing using optofluidic ring resonators

Yuze Sun, Siyka I. Shopova, Greg Frye-Mason, and Xudong Fan  »View Author Affiliations

Optics Letters, Vol. 33, Issue 8, pp. 788-790 (2008)

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We develop rapid chemical-vapor sensors based on optofluidic ring resonators (OFRRs). The OFRR is a glass capillary whose circular wall supports the circulating waveguide modes (WGMs). The OFRR inner surface is coated with a vapor-sensitive polymer. The analyte and polymer interaction causes the polymer refractive index to change, which is detected as a WGM spectral shift. Owing to the excellent fluidics, the OFRR exhibits subsecond detection and recovery time with a flow rate of only 1 mL min , a few orders of magnitude lower than that in the existing optical vapor sensors. The detection limit is estimated to be 5.6 × 10 6 refractive index units, over ten times better than other ring-resonator vapor sensors. Ethanol and hexane vapors are used as a model system, and chemical differentiation is demonstrated with different polymer coatings.

© 2008 Optical Society of America

OCIS Codes
(160.5470) Materials : Polymers
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(230.5750) Optical devices : Resonators
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:

Original Manuscript: February 4, 2008
Revised Manuscript: March 1, 2008
Manuscript Accepted: March 8, 2008
Published: April 9, 2008

Virtual Issues
Vol. 3, Iss. 5 Virtual Journal for Biomedical Optics

Yuze Sun, Siyka I. Shopova, Greg Frye-Mason, and Xudong Fan, "Rapid chemical-vapor sensing using optofluidic ring resonators," Opt. Lett. 33, 788-790 (2008)

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