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|B-Phot Authors||Hugo Thienpont|
P. Wahl, D. S. Ly-Gagnon, C. Debaes, D. A. B. Miller, and H. Thienpont, “B-CALM: An Open-Source GPU-based 3D-FDTD with Multi-Pole Dispersion for Plasmonics,” presented at the Proc. SPIE, Photonics Europe 2012, 2012, vol. 8429, p. 842910.
|Abstract||Numerical calculations with finite-difference time-domain (FDTD) on metallic nanostructures in a broad optical spectrum require an accurate approximation of the permittivity of dispersive materials. In this paper, we present the algorithms behind B-CALM (Belgium-California Light Machine), an open-source 3D-FDTD solver operating on Graphical Processing Units (GPUs) with multi-pole dispersion models. Our modified architecture shows a reduction in computing times for multi-pole dispersion models. We benchmark B-CALM by computing the absorption efficiency of a metallic nanosphere on a broad spectral range with a six-poles Drude-Lorentz model and compare it with Mie theory.|