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O: Fachverband Oberflächenphysik

O 60: Poster Session IV (Solid/liquid interfaces; Semiconductors; Oxides and insulators; Graphene; Plasmonics and nanooptics; Electronic Structure; Surface chemical reactions; Heterogeneous catalysis)

O 60.68: Poster

Wednesday, March 16, 2011, 17:30–21:00, P4

Leakage radiation microscopy of surface plasmons — •Jörg Schmauder, Michael Lutz, Stephen Riedel, Paul Leiderer, Elke Scheer, and Johannes Boneberg — Universität Konstanz

We excite surface plasmons on metal layers (Ag, Au) using an ATR (attenuated total reflection) setup in Kretschmann-configuration with a laserdiode at the wavelenght of 980 nm. A small fraction of the surface plasmons is scattered at the surface into the half space above the prism. The natural roughness of the metal film is sufficient for this scattering process.

We observe the light emitted from the scattered surface plasmons by optical microscopy in dark field mode (leakage radiation microscopy). We report on the decay of the surface plasmons as well as on interference patterns around step structures and optical elements like mirrors, curved mirrors and diffractive gratings.