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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 3 — Feb. 1, 2010
  • pp: 2967–2972

Highly sensitive silicon microring sensor with sharp asymmetrical resonance

Huaxiang Yi, D. S. Citrin, and Zhiping Zhou  »View Author Affiliations

Optics Express, Vol. 18, Issue 3, pp. 2967-2972 (2010)

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We analyze the resonance spectrum in silicon microring resonators taking into account the end-facet reflection from a coupled waveguide, which can provide a dense set of Fabry-Perot resonances. Based on the simple configuration of a microring coupled with a waveguide, the resulting asymmetric Fano-like non-Lorentzian resonance is obtained by scattering theory and experiment. Enhanced sensing performance with steeper slope to the resonance is theoretically predicted and experimentally demonstrated for a 10-μm racetrack silicon microring resonator. A high sensitivity of ~10−8 RIU in terms of the detection limit is obtained in a 30-dB signal-to-noise ratio (SNR) system.

© 2010 OSA

OCIS Codes
(230.4555) Optical devices : Coupled resonators

ToC Category:

Original Manuscript: November 30, 2009
Revised Manuscript: January 7, 2010
Manuscript Accepted: January 21, 2010
Published: January 27, 2010

Huaxiang Yi, D. S. Citrin, and Zhiping Zhou, "Highly sensitive silicon microring sensor with sharp asymmetrical resonance," Opt. Express 18, 2967-2972 (2010)

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