Berlin 2008 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 24: Photonic crystals II

HL 24.6: Vortrag

Dienstag, 26. Februar 2008, 10:45–11:00, EW 202

Time-Domain Simulations for Metallic Nano-Structures — A Krylov-Subspace Approach Beyond the Limitations of FDTD — •Michael König^1,3, Jens Niegemann^1,2,3, Lasha Tkeshelashvili^1,2,3, and Kurt Busch^1,2,3 — ¹Institut für Theoretische Festkörperphysik, Universität Karlsruhe — ²DFG Forschungszentrum Center for Functional Nanostructures (CFN), Universität Karlsruhe — ³Karlsruhe School of Optics & Photonics (KSOP), Universität Karlsruhe

Numerical simulations of metallic nano–structures are crucial for the efficient design of plasmonic devices. Conventional time–domain solvers such as FDTD introduce large numerical errors especially at metallic surfaces. Our approach combines a discontinuous Galerkin method on an adaptive mesh for the spatial discretisation with a Krylov-subspace technique for the time-stepping procedure. Thus, the higher-order accuracy in both time and space is supported by unconditional stability. As illustrative examples, we compare numerical results obtained with our method against analytical reference solutions and results from FDTD calculations.