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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 25 — Sep. 1, 2009
  • pp: F90–F94

Sensitive label-free and compact biosensor based on concentric silicon-on-insulator microring resonators

Xiaohui Li, Ziyang Zhang, Shenying Qin, Tao Wang, Fangfei Liu, Min Qiu, and Yikai Su  »View Author Affiliations


Applied Optics, Vol. 48, Issue 25, pp. F90-F94 (2009)
http://dx.doi.org/10.1364/AO.48.000F90


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Abstract

We propose an ultracompact parallel label-free biosensor based on concentric silicon-on-insulator microring resonators. Our numerical studies show that the proposed biosensor offers higher sensitivity and a larger detection area than conventional single-ring-based sensors. We analyze the detection sensitivity of the DNA hybridization by immobilizing the probe on top of the double concentric ring resonators and in the ring–ring air gap. For a concentric double-ring system with an area of 27.646 μm 2 , the bulk detection sensitivity is 683 nm RIU 1 . The sensitive uniformity of the system related to the optical field distribution is also studied.

© 2009 Optical Society of America

OCIS Codes
(130.6010) Integrated optics : Sensors
(230.4555) Optical devices : Coupled resonators

ToC Category:
Photonic Integration

History
Original Manuscript: February 2, 2009
Revised Manuscript: June 12, 2009
Manuscript Accepted: July 5, 2009
Published: July 21, 2009

Virtual Issues
Vol. 4, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Xiaohui Li, Ziyang Zhang, Shenying Qin, Tao Wang, Fangfei Liu, Min Qiu, and Yikai Su, "Sensitive label-free and compact biosensor based on concentric silicon-on-insulator microring resonators," Appl. Opt. 48, F90-F94 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-25-F90


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