Dresden 2009 – scientific programme
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O: Fachverband Oberflächenphysik
O 31: Nano-optics of metallic and semiconducting nanostructures (theory)
O 31.3: Talk
Wednesday, March 25, 2009, 11:00–11:15, SCH A216
Plasmonic Optical Enhancement in an Au-Ag Hybrid Device for Bio Sensors — •Christin David1, Inez Weidinger2, Peter Hildebrandt2, Marten Richter1, and Andreas Knorr1 — 1Technische Universität Berlin, Institut für Theoretische Physik — 2Technische Universität Berlin, Institut für Chemie
We present a model for plasmonic excitations in Au coated metal bio sensors. Our goal is to illustrate the interplay of surface plasmon polaritons (SPP) in metal layers with localized surface plasmon states (LSP) in the roughened electrode. We find a dielectric gap between electrode and metal layers to be crucial to produce a significant field enhancement.