Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 79: Plasmonics and Nanooptics IV
O 79.4: Vortrag
Donnerstag, 3. April 2014, 16:45–17:00, TRE Ma
Simulations of plasmonic nano-structures using the hydrodynamic DGTD method — •Matthias Moeferdt1, Christian Wolff2, Christian Matyssek1, Rogelio Rodriguez-Oliveros1, and Kurt Busch1,2 — 1Humboldt-Universität zu Berlin, Institut für Physik, AG Theoretische Optik und Photonik, Newtonstr. 15, 12489 Berlin, Germany — 2Max-Born-Institut, Max-Born-Str. 2A, 12489 Berlin, Germany
We present scattering simulations for plasmonic nano-structures, using the Discontinuous Galerkin Time Domain method (DGTD).
A classical nonlocal and nonlinear hydrodynamic material description is employed where the electron gas inside the metal is described by the hydrodynamic Euler equations and the pressure is implemented according to the Thomas-Fermi theory.
This constitutes a versatile computational framework that enables us to reliably obtain second harmonic spectra, to investigate the role of bulk plasmons, and to compute the field enhancement of nano-gap structures.
A comparison with corresponding simulations using a Drude material description allows us to discern nonlocal and nonlinear effects in the field enhancement.