19 May 2010 How does slow light propagate in a real photonic-crystal waveguides?
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Abstract
We report ensemble-average transport characteristics obtained for a series of photonic-crystal waveguides that are supposedly identical and that only differ because of statistical structural fabrication-induced imperfections. In particular, we evidence that, in addition to a smearing of the local density of states, the probability density function of the transmission rapidly broadens in the slow light regime even for group indices as small as ng≈20 and for practical situations offering tolerable -3dB losses. This brings a severe constraint on the effective use of slow light for on-chip optical information processing. The experimental results are quantitatively supported by theoretical results obtained with a coupled-Bloch-mode approach that takes into account multiple scattering and localization effects.
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S. Mazoyer, J. P. Hugonin, P. Lalanne, D. M. Beggs, T. F. Krauss, "How does slow light propagate in a real photonic-crystal waveguides?", Proc. SPIE 7713, Photonic Crystal Materials and Devices IX, 77130K (19 May 2010); doi: 10.1117/12.853965; https://doi.org/10.1117/12.853965
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