Regensburg 2007 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 22: Photonic crystals II
HL 22.8: Vortrag
Dienstag, 27. März 2007, 16:00–16:15, H13
Phase-matched nondegenerate four-wave mixing in one-dimensional photonic crystals — •Christiane Becker1,2, Martin Wegener1,2, Sean Wong1,2, and Georg von Freymann1,2 — 1Institut für Nanotechnologie, Forschungszentrum Karlsruhe in der Helmholtz-Gemeinschaft, Postfach 3640, D-76021 Karlsruhe — 2DFG-Center for Functional Nanostructures, Universität Karlsruhe (TH), D-76128 Karlsruhe
Photonic crystals are a promising class of materials for nonlinear optics. They posses an effective material dispersion relation of light that differs strongly from the dispersion of bulk material. Hence, the important phase matching condition for efficient frequency conversion can be achieved using photonic crystals while it is not possible using bulk material. We report on nondegenerate four-wave mixing in the near infrared using a one-dimensional chalcogenide-glass based photonic crystal. For 76 lattice constants, we find a 3.5-fold enhancement of the mixing signal with respect to the optimum-thickness bulk chalcogenide film. The key is the ability to tailor the dispersion relation of light in the photonic crystal, allowing for phase matching. Numerical calculations agree well with the experiments.