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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 6 — May. 25, 2012

Silicon nano-membrane based photonic crystal microcavities for high sensitivity bio-sensing

Wei-Cheng Lai, Swapnajit Chakravarty, Yi Zou, and Ray T. Chen  »View Author Affiliations

Optics Letters, Vol. 37, Issue 7, pp. 1208-1210 (2012)

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We experimentally demonstrated photonic crystal microcavity based resonant sensors coupled to photonic crystal waveguides in silicon nano-membrane on insulator for chemical and bio-sensing. Linear L-type microcavities are considered. In contrast to cavities with small mode volumes, but low quality factors for bio-sensing, we showed increasing the length of the microcavity enhances the quality factor of the resonance by an order of magnitude and increases the resonance wavelength shift while retaining compact device characteristics. Q~26760 and sensitivity down to 15ng/ml and110pg/mm2 in bio-sensing was experimentally demonstrated on silicon-on-insulator devices.

© 2012 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(230.5298) Optical devices : Photonic crystals

ToC Category:
Integrated Optics

Original Manuscript: October 31, 2011
Revised Manuscript: February 8, 2012
Manuscript Accepted: February 14, 2012
Published: March 26, 2012

Virtual Issues
Vol. 7, Iss. 6 Virtual Journal for Biomedical Optics

Wei-Cheng Lai, Swapnajit Chakravarty, Yi Zou, and Ray T. Chen, "Silicon nano-membrane based photonic crystal microcavities for high sensitivity bio-sensing," Opt. Lett. 37, 1208-1210 (2012)

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