Disorder-induced multiple-scattering in photonic-crystal waveguides
Disorder-induced multiple-scattering in photonic-crystal waveguides
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DOI：
10.1063/1.3253925
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发表时间：
2009-06
期刊：
影响因子：
--
通讯作者：
S. Mazoyer;C. Sauvan;J. Hugonin;P. Lalanne
中科院分区：
文献类型：
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作者：
S. Mazoyer;C. Sauvan;J. Hugonin;P. Lalanne
Slow light in photonic-crystal waveguides (PhCW) is a promising solution for time-domain processing of optical signals and for the enhancement of nonlinear optical effects. Slow light regime is however strongly impacted by random fabrication imperfections and the resulting losses are a critical hurdle limiting the optical delays and the interaction lengths. Therefore perturbation theories have been developed [1,2] to determine how this inevitable fabrication disorder impacts on the slow light propagation in periodic waveguides. However these studies are only valid for imperfections that hardly affect the propagating mode. Recent near field measurements [3] questioned the validity of this approximation even for moderate low group velocities (vg ≫ c/30). In this work, we develop a new coupled-Bloch mode scattering formalism that overcomes the present limitations of perturbation approaches. The formalism takes into account multiple scattering, localization effects and out-of-plane leakage, and allows a quantitative prediction of all the statistical transport coefficients, including averaged values as well as probability distributions.
