Physics – Condensed Matter – Materials Science
Scientific paper
2005-10-25
Proc. SPIE Vol. 5955 (2005) 595503
Physics
Condensed Matter
Materials Science
9 pages, 8 figures (see original publication for images with a better resolution)
Scientific paper
10.1117/12.622184
Recently, split ring-resonators (SRR's) have been realized experimentally in the near infrared (NIR) and optical regime. In this contribution we numerically investigate light propagation through an array of metallic SRR's in the NIR and optical regime and compare our results to experimental results. We find numerical solutions to the time-harmonic Maxwell's equations by using advanced finite-element-methods (FEM). The geometry of the problem is discretized with unstructured tetrahedral meshes. Higher order, vectorial elements (edge elements) are used as ansatz functions. Transparent boundary conditions and periodic boundary conditions are implemented, which allow to treat light scattering problems off periodic structures. This simulation tool enables us to obtain transmission and reflection spectra of plane waves which are incident onto the SRR array under arbitrary angles of incidence, with arbitrary polarization, and with arbitrary wavelength-dependencies of the permittivity tensor. We compare the computed spectra to experimental results and investigate resonances of the system.
Burger Stefaan
Enkrich C.
Klose Roland
Linden Stefan
Schädle Achim
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