Berlin 2012 – scientific programme

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O: Fachverband Oberflächenphysik

O 34: Poster Session I (Graphene; Plasmonics and nanooptics; Coherence and coherent control in nanophotonics and plasmonics)

O 34.41: Poster

Tuesday, March 27, 2012, 18:15–21:45, Poster E

Leakage radiation microscopy of laterally manipulated surface plasmons — •Manuel Roth, Stephen Riedel, Paul Leiderer, Elke Scheer, and Johannes Boneberg — Universität Konstanz

In a Kretschmann-configuration for an ATR (attenuated total reflection) setup, we excite SPPs (surface plasmon polaritons) on thin gold layers with a laser diode at 965 nm. Due to natural surface roughness, a fraction of the SPPs is scattered into the half space above the metal layer and recorded by a camera on top of a microscope (leakage radiation microscopy). Standing wave patterns and scattering centers can be observed on the images.

We report on SPP interference patterns which are created by different surface structures. The results are compared to simulations done by a FDTD (finite-difference time-domain) algorithm provided by Lumerical Solutions.