Cáceres-Aravena Gabriel, Guzmán-Silva Diego, Salinas Ignacio, Vicencio Rodrigo A
Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Chile and Millennium Institute for Research in Optics-MIRO, Universidad de Chile, Chile.
Phys Rev Lett. 2022 Jun 24;128(25):256602. doi: 10.1103/PhysRevLett.128.256602.
The induction of synthetic magnetic fields on lattice structures allows an effective control of their localization and transport properties. In this Letter, we generate effective π magnetic fluxes on a multiorbital diamond lattice, where first-order (S) and second-order (P) 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.
在晶格结构上诱导合成磁场能够有效控制其局域化和输运性质。在本信函中，我们在多轨道金刚石晶格上产生有效的π磁通量，其中一阶（S）和二阶（P）模式有效相互作用。我们在飞秒激光写入的光子晶格上实施z扫描方法，并通过实验观察到S和P模式的阿哈罗诺夫 - 玻姆囚禁，这是能带变换以及由三个简并平带组成的光谱出现的结果。作为一个应用，我们展示了对动力学的完美控制，即我们以完全线性且可控的方式在晶格上平移输入激发。我们基于平带光谱的模型使我们能够根据激发位点或输入相位选择输运方向。
