Sensitivity enhancement of guided-wave surface-plasmon resonance sensors

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...

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Bibliographic Details
Published in:	Optics letters Vol. 33; no. 21; p. 2539
Main Authors:	Lahav, Amit, Auslender, Mark, Abdulhalim, I
Format:	Journal Article
Language:	English
Published:	United States 01-11-2008
Subjects:	Equipment Design Equipment Failure Analysis Optical Devices Refractometry - instrumentation Surface Plasmon Resonance - instrumentation Surface Properties Transducers
Online Access:	Get more information
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Summary:	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.
ISSN:	0146-9592
DOI:	10.1364/OL.33.002539