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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 8, Iss. 8 — Sep. 4, 2013

Integrated interferometric approach to solve microring resonance splitting in biosensor applications

Sam Werquin, Steven Verstuyft, and Peter Bienstman  »View Author Affiliations


Optics Express, Vol. 21, Issue 14, pp. 16955-16963 (2013)
http://dx.doi.org/10.1364/OE.21.016955


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Abstract

Silicon-on-insulator microring resonators have proven to be an excellent platform for label-free nanophotonic biosensors. The high index contrast of silicon-on-insulator allows for fabrication of micrometer-size sensors. However, it also limits the quality of the resonances by introducing an intrinsic mode-splitting. Backscattering of optical power at small waveguide variations lifts the degeneracy of the normal resonator modes. This severely deteriorates the quality of the output signal, which is of utmost importance to determine the performance of the microrings as a biosensor. We suggest an integrated interferometric approach to give access to the unsplit, high-quality normal modes of the microring resonator and experimentally show an improvement of the quality factor by a factor of 3.

© 2013 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(130.6010) Integrated optics : Sensors
(230.5750) Optical devices : Resonators

ToC Category:
Integrated Optics

History
Original Manuscript: May 28, 2013
Revised Manuscript: June 13, 2013
Manuscript Accepted: June 18, 2013
Published: July 9, 2013

Virtual Issues
Vol. 8, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Sam Werquin, Steven Verstuyft, and Peter Bienstman, "Integrated interferometric approach to solve microring resonance splitting in biosensor applications," Opt. Express 21, 16955-16963 (2013)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-21-14-16955


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