Effect of hole-shape irregularities on photonic crystal waveguides

Details Effect of hole-shape irregularities on photonic crystal waveguides Effect of hole-shape irregularities on photonic crystal waveguides

2012-04-24

arxiv.org/abs/1204.5397v1

Physics

Optics

3 pages, 3 figures

Scientific paper

The effect of irregular hole shape on the spectrum and radiation losses of a photonic crystal waveguide is studied using Bloch-mode expansion. Deviations from a perfectly circular hole are characterized by a radius fluctuation amplitude and correlation angle. It is found that the parameter which determines the magnitude of the effect of disorder is the standard deviation of the hole areas. Hence, for a fixed amplitude of the radius fluctuation around the hole, those effects are strongly dependent on the correlation angle of the irregular shape. This result suggests routes to potentially improve the quality of photonic crystal structures.

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