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Opt Lett. 2012 Apr 1;37(7):1175-7. doi: 10.1364/OL.37.001175.

Figure-of-merit enhancement of surface plasmon resonance sensors in the spectral interrogation.

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  • 1Department of Electro-optic Engineering, Ben Gurion University of the Negev, Beer Sheva, Israel.

Abstract

We show that adding a thin dielectric layer with high refractive index on top of the metallic layer in surface plasmon resonance sensors in the Kretschmann-Raether configuration in the spectral mode causes a redshift of the resonance wavelength, narrowing of the resonance dip, and an enhancement to the spectral sensitivity. Surprisingly, together with the sensitivity enhancement, the dip becomes much narrower and the figure of merit is considerably improved, particularly in the IR range.

PMID:
22466186
[PubMed]
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