Dresden 2009 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 43: Photonic crystals I
HL 43.3: Vortrag
Donnerstag, 26. März 2009, 10:00–10:15, POT 151
Multiple Scattering of Light in Three-dimensional Photonic Quasicrystals — •Alexandra Ledermann1, Michael Kallenberg1, Diederik S. Wiersma2, Martin Wegener1, and Georg von Freymann1 — 1Institut für Nanotechnologie, Forschungszentrum Karlsruhe, DFG-Center for Functional Nanostructures (CFN) and Institut für Angewandte Physik, Universität Karlsruhe (TH) — 2European Laboratory for Nonlinear Spectroscopy (LENS) and INFM, Firenze
Quasicrystals (QC) represent a class of solids which lack translational symmetry, yet exhibit perfect long-range order and high-degree rotational symmetries, not necessarily consistent with periodicity. Using direct laser writing [1] we fabricate three-dimensional SU-8 photonic QCs of high quality [2] and study their optical properties. The results of our Laue diffraction experiments and our time-resolved pulse propagation studies are reproduced by our simulations [3], showing that multiple scattering of light plays an important role in describing the unusual properties of QCs. We find features of both, disordered optical systems as well as periodic photonic crystals.
[1] M. Deubel et al., Nature Materials, 3, 444 (2004).
[2] A. Ledermann et al., Nature Materials, 5, 942 (2006).
[3] A. Ledermann et al., Optics Express, submitted (2008).