Berlin 2008 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 36: Poster III
HL 36.26: Poster
Mittwoch, 27. Februar 2008, 16:30–19:00, Poster D
Quasiperiodic structures in metallic photonic crystals — •Christina Bauer1, Dietmar Nau1,2, Sergei Zhukovsky3, and Harald Giessen1 — 14th Physics Institute, University of Stuttgart, 70550 Stuttgart, Germany — 2Institute of Applied Physics, University of Bonn, 53115 Bonn, Germany — 3Physics Institute, University of Bonn, 53115 Bonn, Germany
Quasicrystals are aperiodic structures which possess long-range order but no translational symmetry. We fabricated one-dimensional metallic photonic crystals with quasiperiodic lateral spacing. Gold nanowires were arranged on top of an Indium-Tin-Oxide (ITO) waveguide in a Fibonacci sequence or in Cantor sets. Examining the extinction spectra and comparing them to a purely periodic structure, additional peaks arise. The modelling of the extinction spectra both in TE as well as in TM polarization works well using the model of Nau et al. [1], which takes the spatial Fourier transform of the structure together with the waveguide dispersion into account. Angle-dependent measurements also reveal the photonic bandstructure of such quasiperiodic metallic photonic crystal samples.
[1] D. Nau et al., Phys. Rev. Lett. 98, 133902 (2007).