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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 2 — Feb. 1, 2010
  • pp: 305–310

Analysis of a photonic crystal cavity based on absorbent layer for sensing applications

Jean Dahdah, Nadège Courjal, and Fadi I. Baida  »View Author Affiliations


JOSA B, Vol. 27, Issue 2, pp. 305-310 (2010)
http://dx.doi.org/10.1364/JOSAB.27.000305


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Abstract

We present a photonic crystal (PhC) cavity based on a single hole defect filled with a sensitive absorbent layer for sensing applications. A preliminary study performed with the plane wave expansion method shows that the resonance peak of the cavity mode is 0.5 nm shifted for a 1 nm thickness variation of the sensitive layer. A Lorentz dispersion model implemented in a two-dimensional–finite difference time domain homemade code shows that the absorption of the layer can be exploited for enhancing the sensitivity of the sensor. With the proposed geometry, we find that a variation in the refractive index of 10 7 leads to a variation in the transmittivity of 23% at the resonance peak. This study is proposed for the development of a compact benzene sensor on a MgO doped lithium niobate PhC.

© 2010 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(230.5298) Optical devices : Photonic crystals

ToC Category:
Photonic Crystals

History
Original Manuscript: September 28, 2009
Manuscript Accepted: December 2, 2009
Published: January 22, 2010

Citation
Jean Dahdah, Nadège Courjal, and Fadi I. Baida, "Analysis of a photonic crystal cavity based on absorbent layer for sensing applications," J. Opt. Soc. Am. B 27, 305-310 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-2-305

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