Plasmonic resonances in nanostructured gold/polymer surfaces by colloidal lithography

✍ Scribed by Silvia Giudicatti; Andrea Valsesia; Franco Marabelli; Pascal Colpo; François Rossi

• Book ID: 105365627
• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 799 KB
• Volume: 207
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200925579

✦ Synopsis

Abstract

We investigate nanostructured surfaces consisting of a hexagonal lattice of polymeric pillars embedded in a gold matrix. These systems are prepared by a new fabrication technique based on plasma assisted deposition and colloidal lithography. A complete characterization of such surfaces is performed by angle resolved reflectance and transmittance measurements. Both delocalized and localized plasmonic modes can be identified: their reciprocal interplay allows to observe spectral features and to detect refractive index changes related to one of the sample interfaces by measurements performed with a light beam incident from the opposite side. This intriguing behaviour, together with ease of use and low cost of the deposition procedure, make this kind of nanostructures particularly interesting in biosensing applications.