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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. 6, Iss. 9 — Oct. 3, 2011

Optical bio-chemical sensors on SNOW ring resonators

Mohammadreza Khorasaninejad, Nigel Clarke, M. P. Anantram, and Simarjeet Singh Saini  »View Author Affiliations


Optics Express, Vol. 19, Issue 18, pp. 17575-17584 (2011)
http://dx.doi.org/10.1364/OE.19.017575


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Abstract

In this paper, we propose and analyze novel ring resonator based bio-chemical sensors on silicon nanowire optical waveguide (SNOW) and show that the sensitivity of the sensors can be increased by an order of magnitude as compared to silicon-on-insulator based ring resonators while maintaining high index contrast and compact devices. The core of the waveguide is hollow and allows for introduction of biomaterial in the center of the mode, thereby increasing the sensitivity of detection. A sensitivity of 243 nm/refractive index unit (RIU) is achieved for a change in bulk refractive index. For surface attachment, the sensor is able to detect monolayer attachments as small as 1 Å on the surface of the silicon nanowires.

© 2011 OSA

OCIS Codes
(040.6040) Detectors : Silicon
(230.7370) Optical devices : Waveguides
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Sensors

History
Original Manuscript: July 22, 2011
Manuscript Accepted: August 10, 2011
Published: August 22, 2011

Virtual Issues
Vol. 6, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Mohammadreza Khorasaninejad, Nigel Clarke, M. P. Anantram, and Simarjeet Singh Saini, "Optical bio-chemical sensors on SNOW ring resonators," Opt. Express 19, 17575-17584 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-19-18-17575


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