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B-CALM: An open-source GPU-based 3D-FDTD with multi-pole dispersion for plasmonics |
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| Authors: | Wahl Pierre Ly-Gagnon Dany-Sebastien Debaes Christof Miller David A. B. Thienpont Hugo |
| Affiliation: | 1.Brussels Photonics Team, Applied Physics and Photonics Department, Vrije Universiteit Brussels, Pleinlaan 2, Brussels, Belgium ;2.Department of Electrical Engineering, Stanford University, Stanford, CA, 940305, USA ; |
| 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 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. |
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