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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 33, Iss. 21 — Nov. 1, 2008
  • pp: 2500–2502

Planar waveguide-coupled, high-index-contrast, high-Q resonators in chalcogenide glass for sensing

Juejun Hu, Nathan Carlie, Ning-Ning Feng, Laeticia Petit, Anu Agarwal, Kathleen Richardson, and Lionel Kimerling  »View Author Affiliations


Optics Letters, Vol. 33, Issue 21, pp. 2500-2502 (2008)
http://dx.doi.org/10.1364/OL.33.002500


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Abstract

High-index-contrast compact microdisk resonators in thermally evaporated As 2 S 3 and Ge 17 Sb 12 S 71 chalcogenide glass films are designed and fabricated using standard UV lithography and characterized. Our pulley coupler configuration demonstrates coupling of the resonators to monolithically integrated photonic wire waveguides without resorting to demanding fine-line lithography. Microdisk resonators in As 2 S 3 support whispering-gallery-mode with cavity quality factors ( Q ) exceeding 2 × 10 5 , the highest Q value reported in resonator structures in chalcogenide glasses to the best of our knowledge. We have successfully demonstrated a lab-on-a-chip prototype sensor device with the integration of our resonator with planar microfluidic systems. The sensor shows a refractive index sensitivity of 182 nm RIU (refractive index unit) and a wavelength resolution of 0.1 pm through a resonant peak fit. This corresponds to a refractive index detection limit of 8 × 10 7 RIU at 1550 nm in wavelength, which could be further improved by shifting the operating wavelength to a region where water absorption is reduced.

© 2008 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(130.4310) Integrated optics : Nonlinear
(130.6010) Integrated optics : Sensors
(160.2750) Materials : Glass and other amorphous materials
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(130.2755) Integrated optics : Glass waveguides

ToC Category:
Integrated Optics

History
Original Manuscript: August 6, 2008
Manuscript Accepted: September 7, 2008
Published: October 24, 2008

Virtual Issues
Vol. 4, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Juejun Hu, Nathan Carlie, Ning-Ning Feng, Laeticia Petit, Anu Agarwal, Kathleen Richardson, and Lionel Kimerling, "Planar waveguide-coupled, high-index-contrast, high-Q resonators in chalcogenide glass for sensing," Opt. Lett. 33, 2500-2502 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-21-2500


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