论文标题
来自安德森吸引者的随机激光
Random lasing from Anderson attractors
论文作者
论文摘要
我们介绍并研究了二维耗散非线性泵送模型，该模型的特征是线性方案中的局部或离域本征模，此外还包括非线性，耗散和泵送。我们发现，在某个泵浦阈值上面，该模型具有由Anderson吸引子的孤立簇产生的狭窄光谱激光线。随着泵送的增加，即使在线性模式的局部阶段仍然很好地存在激光频谱，即使狭窄的激光峰仍然很好。在金属阶段，狭窄的光谱峰的存在被显着抑制。我们认为该模型捕获了观察到随机激光器的主要特征。
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.
