Controlled Transport Based on Multiorbital Aharonov-Bohm Photonic Caging
| Autor: | Gabriel Cáceres-Aravena, Diego Guzmán-Silva, Ignacio Salinas, Rodrigo A. Vicencio |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Physical review letters. 128(25) |
| ISSN: | 1079-7114 |
| Popis: | The induction of synthetic magnetic fields on lattice structures allows to effectively control their localization and transport properties. In this work, we generate effective $\pi$ 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. Comment: 6 pages, 3 figures |
| Databáze: | OpenAIRE |
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