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Strong near-field optical localization on an array of gold nanodisks

AuthorsAigouy, Lionel; Prieto Vizán, Patricia ; Vitrey, Alan ; Anguita, José Virgilio ; Cebollada, Alfonso ; González Sagardoy, María Ujué
KeywordsDiscs (structures)
Finite difference time-domain analysis
Light polarisation
Nanostructured materials
Near-field scanning optical microscopy
Numerical analysis
Issue Date19-Aug-2011
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 110(4): 044308 (2011)
AbstractBy scanning near-field optical microscopy, we measured the localization of the electromagnetic field on an array of gold nanodisks illuminated in a transmission mode. We experimentally observed that the field is localized between the disks, with a pattern oriented along the incident polarization direction. We also observed that the electromagnetic field rapidly decays above the nanodisks, showing a strong vertical localization. The experimental results are in good agreement with numerical simulations performed by a finite difference time domain method. This study provides quantitative information about the local optical properties of closely-packed nanodisks that can be used for applications in biochemical sensors and nanolithography.
Description5 figuras, 5 páginas
Publisher version (URL)http://dx.doi.org/10.1063/1.3624749
Appears in Collections:(IMN-CNM) Artículos
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