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O: Fachverband Oberflächenphysik
O 60: Poster Session IV (Solid/liquid interfaces; Semiconductors; Oxides and insulators; Graphene; Plasmonics and nanooptics; Electronic Structure; Surface chemical reactions; Heterogeneous catalysis)
O 60.61: Poster
Wednesday, March 16, 2011, 17:30–21:00, P4
Modelling of Optical Nanoantennas for Nonlinear Spectroscopy — •Daniela Ullrich1,2, Thorsten Schumacher1,2, Harald Gießen2, and Markus Lippitz1,2 — 1Max Planck Institute for Solid State Research, Stuttgart — 24th Physics Institute, University of Stuttgart
The null-field method (also known as the T-Matrix approach) is a powerful tool to simulate the light scattering by single and compound particles. Here, we demonstrate that our nonlinear transient transmission measurements on single as well as antenna-coupled gold nanoparticles can be modelled numerically using the null-field method. This allows us to further optimize the optical nanoantennas with the help of the simulations. Additionally, other materials such as aluminium or silver can be included. We compare the predicted behavior to our measurements on the optimized antenna structures. Finally we show that the numerical model can be adapted to describe plasmon-enhanced sensing using dielectric nanoparticles.