Dresden 2009 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 9: Poster 1
HL 9.100: Poster
Montag, 23. März 2009, 14:30–17:00, P2
Modelling of metamaterials using a coupled dipole approach — •Jens Küchenmeister1, Sabine Essig1,2,3, Lasha Tkeshelashvili1,3, and Kurt Busch1,2,3 — 1Institut für Theoretische Festkörperphysik, Universität Karlsruhe — 2Karlsruhe School of Optics & Photonics (KSOP), Universität Karlsruhe — 3DFG Centrum für Funktionelle Nanostrukturen (CFN), Universität Karlsruhe
Controlling the properties of metamaterials using different sizes and shapes of the basic building blocks, i.e. metallic nanostructures allows for a far-reaching control of the effective material properties. Fully numerical approaches via, e.g., the Fourier Modal method (FMM) or the Finite Element Method that directly solve Maxwell’s equations require siginificant computational resources and are usually not suitable for design studies.
We present a coupled-dipole approach to metamaterials which allows for efficient parameter studies. The model contains few free parameters that are determined by comparison with exact numerics via FMM for simple systems such as periodic arrays of metallic rods. More complex structures can be systematically constructed, thus providing physical insights and allowing for rapid designs studies. We apply this approach to certain (chiral) multi-layer structures.