Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 50: Plasmonics and Nanooptics V
O 50.7: Vortrag
Mittwoch, 16. März 2011, 16:30–16:45, WIL A317
Simulating EELS Spectra using the Discontinuous Galerkin Time Domain Method — •Christian Matyssek1,2, Jens Niegemann3, Wolfram Hergert2, and Kurt Busch3 — 1Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany — 2Institute of Physics, von-Seckendorff-Platz 1, 06120 Halle, Germany — 3Institut für Theoretische Festkörperphysik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), D-76128 Karlsruhe, Germany
Electron Energy Loss Spectroscopy (EELS) was recently used to examine single metal nano particles[1] and also systems of particles[2,3]. Frequently, the calculation of these spectra is done in frequency domain, e.g. using the Boundary Element Method[1]. We present the calculation of EEL spectra using the Discontinuous Galerkin Time Domain (DGTD) method, which is well approved in photonics calculations[4]. The numerical results are compared to analytical results that are available for spheres. The influence of substrates on the surface-plasmon excitation is studied. Application of nonlinear material models will be discussed.
[1] Nelayah et al., Nat. Phys. 3, 348 (2007)
[2] Chu et al., Nanotech. 20, 235705 (2009)
[3] Sigle et al., Opt. Lett. 34, 2150 (2009)
[4] Niegemann et al., Phot. and Nanostr. 7, 2 (2009)