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Q: Fachverband Quantenoptik und Photonik
Q 55: Poster III
Q 55.50: Poster
Thursday, March 5, 2009, 16:30–19:00, VMP 8 Foyer
Negative refraction and nanoscale coupling in plasmonic waveguide arrays — •Arian Kriesch1,2 and Ulf Peschel1 — 1MPI für die Physik des Lichts, Erlangen, Germany — 2Erlangen Graduate School in Advanced Optical Technologies (SAOT)
Recently it was demonstrated that highly birefringent materials can show negative refraction. An array of metallic stripes can serve as such kind of metamaterial, but it also forms a system of coupled plasmonic waveguides thus transferring the concept of optical discreteness to the nano-world.
Here we report results of a finite elements simulation of the propagation of electromagnetic waves in planar arrays of plasmonic nanowaveguides made from gold or silver on substrates of silicon or silica. We have optimized this configuration to obtain strong coupling between the waveguides, but also minimum losses. We intend to realize this structure and to analyze it by scanning near field optical microscopy (SNOM) as well as by cathodoluminescence (CL) imaging. The experimental examination of the predicted coupling effects promises new insights into the processes of discrete diffraction and negative refraction on previously unmatched small scales. A further goal is to achieve the formation of discrete spatial solitons in such a nanoarray.