论文标题
基于多功能Aharonov-Bohm光子笼的受控运输
Controlled transport based on multiorbital Aharonov-Bohm photonic caging
论文作者
论文摘要
晶格结构上合成磁场的诱导可以有效控制其定位和运输特性。在这项工作中，我们在多轨钻石晶格上生成有效的$π$磁通量，其中首先（$ s $）和第二（$ p $）订单模式有效地相互作用。我们在飞秒激光书面的光子晶格上实现了$ z $ scan方法，并通过频段变换和由三个退化平面频段组成的频谱出现，实验观察$ s $和$ p $模式的Aharonov-bohm笼子。作为一个应用程序，我们演示了对动力学的完美控制，在该控制下，我们以完全线性和受控的方式将跨晶格的输入激发转换。我们的模型基于平坦的频谱，使我们可以根据激发位点或输入阶段选择传输方向。
The induction of synthetic magnetic fields on lattice structures allows to effectively control their localization and transport properties. In this work, we generate effective $π$ magnetic fluxes on a multi-orbital diamond lattice, where first ($S$) and second ($P$) order modes effectively interact. We implement a $z$-scan method on femtosecond laser written photonic lattices and experimentally observe Aharonov-Bohm caging for $S$ and $P$ modes, as a consequence of a band transformation and the emergence of a spectrum composed of three degenerated flat bands. As an application, we demonstrate a perfect control of the dynamics, where we translate an input excitation across the lattice in a completely linear and controlled way. Our model, based on a flat band spectrum, allows us to choose the direction of transport depending on the excitation site or input phase.
