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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 15 — Aug. 1, 2010
  • pp: 2523–2525

Refractive index sensing with an air-slot photonic crystal nanocavity

Jana Jágerská, Hua Zhang, Zhaolu Diao, Nicolas Le Thomas, and Romuald Houdré  »View Author Affiliations

Optics Letters, Vol. 35, Issue 15, pp. 2523-2525 (2010)

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We investigate an air-slot photonic crystal cavity for high-precision refractive index sensing. The high quality factor 2.6 × 10 4 of the cavity, along with a strong overlap between the resonant mode and the hollow core region, allows us to achieve an experimental sensitivity of 510 nm per refractive index unit (RUI) and a detection limit below 1 × 10 5 RUI . The device has a remarkably low sensing volume of 40 aliters , holding less than 1 × 10 6 molecules.

© 2010 Optical Society of America

OCIS Codes
(230.3120) Optical devices : Integrated optics devices
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(230.5298) Optical devices : Photonic crystals

ToC Category:
Optical Devices

Original Manuscript: April 13, 2010
Manuscript Accepted: June 2, 2010
Published: July 20, 2010

Jana Jágerská, Hua Zhang, Zhaolu Diao, Nicolas Le Thomas, and Romuald Houdré, "Refractive index sensing with an air-slot photonic crystal nanocavity," Opt. Lett. 35, 2523-2525 (2010)

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