Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 63: Plasmonics and Nanooptics V
O 63.4: Vortrag
Donnerstag, 25. März 2010, 11:15–11:30, H32
Optical response of metallic nanostructures: simulation vs. measurement — •Reto Giannini1, Patrick Leidenberger2, Christian Hafner2, and Jörg F. Löffler1 — 1Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland — 2Laboratory for Electromagnetic Fields and Microwave Electronics, ETH Zurich, 8092 Zurich, Switzerland
Today various different tools for calculating the optical response of metallic nanostructures are available. All of them are based on a geometric description of the nanostructures, which makes it difficult to take into account production-based variations in the shape of the structure under investigation. In the context of plasmon resonances in the optical wavelength range and related effects, such as field enhancement, this discrepancy can generate significant deviations between simulation and measurement. To address this problem, we performed a series of FEM-based simulations on Au-nanoparticles, aiming to approach as closely as possible the structures available using today's state-of-the art production techniques. The simulations were carried out using JCMsuite (axis-symmetric model) and Comsol (full 3D), and special attention was paid to corners, triple-points and particle deformation. The calculated results were then compared with nanoparticles produced and analyzed in-house.