Optical sensing based on plasmon coupling in nanoparticle arrays

The performance of bi-periodic arrays of gold nano-particles for molecular sensing applications is studied using the Fourier Modal Method (FMM). We show that the electromagnetic coupling between the particles can be optimized to increase their sensitivity to a weak change of the shallow dielectric e...

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Bibliographic Details
Published inOptics express Vol. 12; no. 15; pp. 3422 - 3427
Main Authors Enoch, Stefan, Quidant, Romain, Badenes, Goncal
Format Journal Article
LanguageEnglish
Published United States 26.07.2004
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Summary:The performance of bi-periodic arrays of gold nano-particles for molecular sensing applications is studied using the Fourier Modal Method (FMM). We show that the electromagnetic coupling between the particles can be optimized to increase their sensitivity to a weak change of the shallow dielectric environment. Especially, arrays whose elementary cell consists of a dimer of two closely packed particles are found to be at least three times more sensitive than single particle arrays.
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ISSN:1094-4087
1094-4087
DOI:10.1364/opex.12.003422