论文标题
在非线性驱动式光子晶格中具有记忆的拓扑结构
Topology with memory in nonlinear driven-dissipative photonic lattices
论文作者
论文摘要
我们考虑了受到连贯驱动器的非线性损耗谐振器的光子晶格，该系统记得其拓扑阶段。最初，该系统在拓扑上是微不足道的。应用额外的连贯脉冲后，强度增加，这会改变系统中的耦合，然后诱导拓扑相变。但是，当脉搏的效果消失时，系统不会返回到琐碎的阶段。取而代之的是，它记住拓扑阶段，并保持其在脉冲应用中获得的拓扑结构。该脉冲可以用作触发拓扑模式扩增的开关。我们进一步表明，扩增发生在不同的频率以及与脉冲不同的位置，表明频率转换和强度转移。我们的工作对于触发主动拓扑光子设备的不同功能可能很有用。
We consider a photonic lattice of nonlinear lossy resonators subjected to a coherent drive, where the system remembers its topological phase. Initially, the system is topologically trivial. After the application of an additional coherent pulse, the intensity is increased, which modifies the couplings in the system and then induce a topological phase transition. However, when the effect of the pulse dies out, the system does not go back to the trivial phase. Instead, it remembers the topological phase and maintains its topology acquired during the pulse application. The pulse can be used as a switch to trigger amplification of the topological modes. We further show that the amplification takes place at a different frequency as well as at a different position from those of the pulse, indicating frequency conversion and intensity transfer. Our work can be useful in triggering the different functionalities of active topological photonic devices.
