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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 33, Iss. 6 — Mar. 15, 2008
  • pp: 596–598

Spiral-path high-sensitivity silicon photonic wire molecular sensor with temperature-independent response

A. Densmore, D.-X. Xu, S. Janz, P. Waldron, T. Mischki, G. Lopinski, A. Delâge, J. Lapointe, P. Cheben, B. Lamontagne, and J. H. Schmid  »View Author Affiliations


Optics Letters, Vol. 33, Issue 6, pp. 596-598 (2008)
http://dx.doi.org/10.1364/OL.33.000596


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Abstract

We demonstrate a new silicon photonic wire waveguide evanescent field (PWEF) sensor that exploits the strong evanescent field of the transverse magnetic mode of this high-index-contrast, submicrometer-dimension waveguide. High sensitivity is achieved by using a 2 mm long double-spiral waveguide structure that fits within a compact circular area of 150 μ m diameter, facilitating compatibility with commercial spotting apparatus and the fabrication of densely spaced sensor arrays. By incorporating the PWEF sensor element into a balanced waveguide Mach–Zehnder interferometer circuit, a minimum detectable mass of 10 fg of streptavidin protein is demonstrated with near temperature-independent response.

© 2008 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(130.3120) Integrated optics : Integrated optics devices
(130.6010) Integrated optics : Sensors

ToC Category:
Integrated Optics

History
Original Manuscript: December 5, 2007
Revised Manuscript: February 6, 2008
Manuscript Accepted: February 10, 2008
Published: March 14, 2008

Virtual Issues
Vol. 3, Iss. 4 Virtual Journal for Biomedical Optics

Citation
A. Densmore, D.-X. Xu, S. Janz, P. Waldron, T. Mischki, G. Lopinski, A. Delâge, J. Lapointe, P. Cheben, B. Lamontagne, and J. H. Schmid, "Spiral-path high-sensitivity silicon photonic wire molecular sensor with temperature-independent response," Opt. Lett. 33, 596-598 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-6-596

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