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Opt Lett. 2008 Nov 1;33(21):2539-41.

Sensitivity enhancement of guided-wave surface-plasmon resonance sensors.

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1
Department of Electro-Optic Engineering, Ben Gurion University, Beer Sheva, Israel.

Abstract

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.

PMID:
18978913
[Indexed for MEDLINE]
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