Abstract
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 magnetic fluxes on a multiorbital diamond lattice, where first-order () and second-order () modes effectively interact. We implement a -scan method on femtosecond-laser-written photonic lattices and experimentally observe Aharonov-Bohm caging for and 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.
- Received 27 January 2022
- Accepted 3 June 2022
DOI:https://doi.org/10.1103/PhysRevLett.128.256602
© 2022 American Physical Society