Anderson吸引子的随机激光
Random lasing from Anderson attractors
摘要：
介绍并研究了一个二维耗散非线性Anderson泵浦模型，该模型的特征在于线性区域中的局域或离域本征模，此外还包括非线性、耗散和泵浦。我们发现，在一定的泵浦阈值以上，该模型具有狭窄的光谱激射线所产生的孤立集群的安德森吸引子。随着抽运强度的增加，即使在线性模的局域相位中仍然存在较窄的激光峰，激光谱也会变宽。在金属相中，窄光谱峰的存在被显著抑制。我们认为，该模型捕捉随机激光器观察到的主要特征。
英文摘要：
We introduce and study a two-dimensional dissipative nonlinear Anderson pumping model which is characterized by localized or delocalized eigenmodes in a linear regime and in addition includes nonlinearity, dissipation and pumping. We find that above a certain pumping threshold the model has narrow spectral lasing lines generated by isolated clusters of Anderson attractors. With the increase of the pumping, the lasing spectrum is broaden even if narrow lasing peaks are still well present in the localized phase of linear modes. In the metallic phase, the presence of narrow spectral peaks is significantly suppressed. We argue that the model captures main features observed for random lasers.
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