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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 8 — Apr. 12, 2010
  • pp: 8087–8093

Experimental determination of the sensitivity of Bloch Surface Waves based sensors

Fabrizio Giorgis, Emiliano Descrovi, Caterina Summonte, Lorenzo Dominici, and Francesco Michelotti  »View Author Affiliations

Optics Express, Vol. 18, Issue 8, pp. 8087-8093 (2010)

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Detection of glucose in water solution for several different concentrations has been performed with the purpose to determine the sensitivity of Near Infrared Bloch Surface Waves (λ = 1.55μm) upon refractive index variations of the outer medium. TE-polarized electromagnetic surface waves are excited by a prism on a silicon nitride multilayer, according to the Kretschmann configuration. The real-time reflectance changes induced by discrete variations in glucose concentration has been revealed and analyzed. Without using any particular averaging strategy during the measurements, we pushed the device detection limit down to a glucose concentration of 2.5mg/dL, corresponding to a minimum detectable refractive index variation of the water solution as low as 3.8·10−6.

© 2010 OSA

OCIS Codes
(240.6690) Optics at surfaces : Surface waves
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Optics at Surfaces

Original Manuscript: January 28, 2010
Revised Manuscript: March 29, 2010
Manuscript Accepted: March 29, 2010
Published: April 1, 2010

Virtual Issues
Vol. 5, Iss. 8 Virtual Journal for Biomedical Optics

Fabrizio Giorgis, Emiliano Descrovi, Caterina Summonte, Lorenzo Dominici, and Francesco Michelotti, "Experimental determination of the sensitivity of Bloch Surface Waves based sensors," Opt. Express 18, 8087-8093 (2010)

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