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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 15 — Aug. 1, 2014
  • pp: 4442–4445

Evanescent field waveguide sensing with subwavelength grating structures in silicon-on-insulator

J. Gonzalo Wangüemert-Pérez, Pavel Cheben, Alejandro Ortega-Moñux, Carlos Alonso-Ramos, Diego Pérez-Galacho, Robert Halir, Iñigo Molina-Fernández, Dan-Xia Xu, and Jens H. Schmid  »View Author Affiliations


Optics Letters, Vol. 39, Issue 15, pp. 4442-4445 (2014)
http://dx.doi.org/10.1364/OL.39.004442


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Abstract

We explore, to the best of our knowledge, the potential of diffractionless subwavelength grating waveguides for sensing applications. We show that by subwavelength patterning of silicon-wire waveguides the field delocalization can be engineered to increase the sensitivity. Fully vectorial 3D-FDTD simulations confirm the sensitivity enhancement, achieving sensitivities of 0.83RIU/RIU and 1.5·103RIU/nm for bulk and surface sensing, respectively, which compare favorably to state-of-the-art sensing waveguides.

© 2014 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(130.6010) Integrated optics : Sensors
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Integrated Optics

History
Original Manuscript: April 29, 2014
Revised Manuscript: June 20, 2014
Manuscript Accepted: June 21, 2014
Published: July 23, 2014

Citation
J. Gonzalo Wangüemert-Pérez, Pavel Cheben, Alejandro Ortega-Moñux, Carlos Alonso-Ramos, Diego Pérez-Galacho, Robert Halir, Iñigo Molina-Fernández, Dan-Xia Xu, and Jens H. Schmid, "Evanescent field waveguide sensing with subwavelength grating structures in silicon-on-insulator," Opt. Lett. 39, 4442-4445 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-15-4442


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