title: Numerical simulation of Electron Energy Loss Spectroscopy using a Generalized Multipole Technique.
abstract: We numerically simulate low-loss Electron Energy Loss Spectroscopy (EELS) of isolated spheroidal nanoparticles, using an electromagnetic model based on a Generalized Multipole Technique (GMT). The GMT is fast and accurate, and, in principle, flexible regarding nanoparticle shape and the incident electron beam. The implemented method is validated against reference analytical and numerical methods for plane-wave scattering by spherical and spheroidal nanoparticles. Also, simulated electron energy loss (EEL) spectra of spherical and spheroidal nanoparticles are compared to available analytical and numerical solutions. An EEL spectrum is predicted numerically for a prolate spheroidal aluminum nanoparticle. The presented method is the basis for a powerful tool for the computation, analysis and interpretation of EEL spectra of general geometric configurations.
authors: Foundation Institute of Materials Science (IWT), Department of Production Engineering, University of Bremen, Badgasteiner Str. 3, 28359 Bremen, Germany.
authors: Lars
authors: L
authors: Kiewidt
authors: Mirza
authors: M
authors: Karamehmedović
authors: Christian
authors: C
authors: Matyssek
authors: Wolfram
authors: W
authors: Hergert
authors: Lutz
authors: L
authors: Mädler
authors: Thomas
authors: T
authors: Wriedt
mesh_terms: D004583:Electrons; D008962:Models, Theoretical; D053758:Nanoparticles / Q000737:chemistry*; D046590:Spectroscopy, Electron Energy-Loss / Q000379:methods*
keywords: Characterization; Computational modeling; Electron Energy Loss Spectroscopy; Generalized Multipole Technique; Nanoparticles; Nanoplasmonics