光学频率梳激发的安德森局域化特征
Signatures of the Anderson localization excited by an optical frequency comb
摘要：
我们调查安德森局域化的光发生在超短激发。基于时间相关耦合模方程的理论预测了透射脉冲频谱的普遍特征。特别是，强本地化的光的过程被示出对应于在振幅和在传输脉冲的群延迟中的峰值的形成。并行从头算模拟与时域差分码和分子动力学证实了理论预测，同时表明存在一个最佳程度的无序强本地化。
英文摘要：
We investigate Anderson localization of light as occurring in ultra-short excitations. A theory based on time dependent coupled-mode equations predicts universal features in the spectrum of the transmitted pulse. In particular, the process of strong localization of light is shown to correspond to the formation of peaks in both the amplitude and in the group delay of the transmitted pulse. Parallel ab-initio simulations made with Finite-Difference Time Domain codes and molecular dynamics confirm theoretical predictions, while showing that there exist an optimal degree of disorder for the strong localization.
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