Local refractive index sensitivity of plasmonic nanoparticles

0367832 - ÚFE 2012 RIV US eng J - Journal Article
Piliarik, Marek - Kvasnička, Pavel - Galler, N. - Krenn, J. R. - Homola, Jiří
Local refractive index sensitivity of plasmonic nanoparticles.
Optics Express. Roč. 19, č. 10 (2011), s. 9213-9220. ISSN 1094-4087
R&D Projects: GA AV ČR KAN200670701; GA MŠMT OC09058
Institutional research plan: CEZ:AV0Z20670512
Keywords : Surface plasmon resonance * Subwavelength structures, nanostructures * Optical sensing and sensors
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Impact factor: 3.587, year: 2011

We report on an experimental characterization of the sensitivity of localized surface plasmons (LSP) to local changes in the refractive index at a nanometer scale. The method is based on forming a polymer mask covering different well defined areas of metallic nanoparticles and measuring the extinction peak shifts associated with the local refractive index changes. The experimental results are shown to correspond well with theoretical simulations. The results indicate that the sensitivity is strongly correlated with the profile of the LSP electric field.
Permanent Link: http://hdl.handle.net/11104/0202374