Controlled Transport Based on Multiorbital Aharonov-Bohm Photonic Caging,Physical Review Letters

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Controlled Transport Based on Multiorbital Aharonov-Bohm Photonic Caging
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-06-23 , DOI: 10.1103/physrevlett.128.256602
Gabriel Cáceres-Aravena ₁ , Diego Guzmán-Silva ₁ , Ignacio Salinas ₁ , Rodrigo A Vicencio ₁

Affiliation

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.

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