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arXiv 0906.0464physics.optics
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慢光光子晶体波导中的无序诱导相干散射

Disorder-induced coherent scattering in slow-light photonic crystal waveguides

M. Patterson, S. Hughes, S. Combri'e, N. -V. -Quynh Tran, A. De Rossi, R. Gabet, Y. Jaouen

摘要:

我们提出了GaAs光子晶体膜的光传输测量和频率延迟反射图,这表明从传播与一个定义良好的群速度完全由无序诱导的相干散射为主的制度的过渡。采用自洽的光学散射理论,只有统计函数来描述的结构无序,我们得到了一个很好的协议与实验,没有拟合参数。我们的实验和理论一起提供了清晰的物理洞察自然发生的光本地化和多相干散射现象在慢光波导。

英文摘要:

We present light transmission measurements and frequency-delay reflectometry maps for GaAs photonic crystal membranes, which show the transition from propagation with a well defined group velocity to a regime completely dominated by disorder-induced coherent scattering. Employing a self-consistent optical scattering theory, with only statistical functions to describe the structural disorder, we obtain an excellent agreement with the experiments using no fitting parameters. Our experiments and theory together provide clear physical insight into naturally occurring light localization and multiple coherent-scattering phenomena in slow-light waveguides.

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