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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 4189–4197

Electrical tracing-assisted dual-microring label‑free optical bio/chemical sensors

Junfeng Song, Xianshu Luo, Xiaoguang Tu, Mi Kyoung Park, Jack Sheng Kee, Huijuan Zhang, Mingbin Yu, Guo-Qiang Lo, and Dim-Lee Kwong  »View Author Affiliations

Optics Express, Vol. 20, Issue 4, pp. 4189-4197 (2012)

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We propose and demonstrate a novel electrical tracing-assisted dual-microring resonator-based optical sensor system in silicon-on-insulator substrate. The system comprises one microring resonator-based sensing element and another microring resonator-based tracing element integrated with electrical controller. The resonance wavelength shift of sensing microring induced by the refractive index change is traced and determined by direct voltage supply of the electrical tunable tracing microring. Such optical sensing system eliminates the traditional wavelength-scanning method thus provide a cost effective sensing scheme. Proof-of-principle demonstration by testing polyelectrolyte multilayer shows the sensitivity of ~4.0 mW/ng∙mm−2 and the detection limit of ~5.35 pg/mm2.

© 2012 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(130.6010) Integrated optics : Sensors
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:

Original Manuscript: October 10, 2011
Revised Manuscript: November 9, 2011
Manuscript Accepted: November 10, 2011
Published: February 6, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Junfeng Song, Xianshu Luo, Xiaoguang Tu, Mi Kyoung Park, Jack Sheng Kee, Huijuan Zhang, Mingbin Yu, Guo-Qiang Lo, and Dim-Lee Kwong, "Electrical tracing-assisted dual-microring label‑free optical bio/chemical sensors," Opt. Express 20, 4189-4197 (2012)

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