Berlin 2005 – scientific programme

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HL: Halbleiterphysik

HL 62: Photonische Kristalle IV

HL 62.3: Talk

Wednesday, March 9, 2005, 11:15–11:30, TU P164

Microwave modelling of disorder in photonic crystal slab waveguides — •Jan Brosi, Christopher Poulton, and Wolfgang Freude — Institut für Hochfrequenztechnik und Quantenelektronik, Universität Karlsruhe, Engesserstr. 5, D-76128 Karlsruhe

Disorder due to imperfect fabrication processes of photonic crystals is unavoidable and has a significant effect on the loss of photonic crystal waveguides.

We studied the influence of positional and radial disorder of the air holes in a high-index triangular lattice photonic crystal slab with line defect. For the experimental investigation, we used a microwave model, where the frequency was downscaled by a factor of 20,000 to 10 GHz and the dimensions of the structure were upscaled by the same factor. This way, ideal structures could be fabricated and well-defined disorder introduced. From the measurements, amplitude and phase data could be obtained, and the results were compared to numerical results.