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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 21 — Nov. 1, 2008
  • pp: 2539–2541

Sensitivity enhancement of guided-wave surface-plasmon resonance sensors

Amit Lahav, Mark Auslender, and I. Abdulhalim  »View Author Affiliations

Optics Letters, Vol. 33, Issue 21, pp. 2539-2541 (2008)

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It is demonstrated theoretically and experimentally that, by using the guided-wave surface-plasmon sensor configuration with a top layer of dielectric thin film ( 10 15 nm ) having a high value of the real part of the dielectric function, it is possible to improve the sensitivity of the sensor up to 1 order of magnitude. The stability is improved because the thin nanolayer acts as a protection layer for the metal. The enhancement is due to the increase in the interaction volume and the evanescent field enhancement near the top layer–analyte interface.

© 2008 Optical Society of America

OCIS Codes
(240.0240) Optics at surfaces : Optics at surfaces
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(310.2790) Thin films : Guided waves

ToC Category:
Optical Devices

Original Manuscript: August 5, 2008
Revised Manuscript: September 12, 2008
Manuscript Accepted: September 12, 2008
Published: October 29, 2008

Virtual Issues
Vol. 4, Iss. 1 Virtual Journal for Biomedical Optics

Amit Lahav, Mark Auslender, and I. Abdulhalim, "Sensitivity enhancement of guided-wave surface-plasmon resonance sensors," Opt. Lett. 33, 2539-2541 (2008)

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