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This research demonstrates the experimental realization of phase-controlled transport for compact chiral photonic states within a Floquet-driven flat band lattice system. By utilizing an Aharonov-Bohm caging effect, the study achieves directional propagation of localized states that are typically immobile in linear environments, effectively creating a stroboscopic quantum walk. These findings advance the understanding of topological photonics and offer new pathways for manipulating light transport in engineered photonic structures.
Phase-controlled transport of Floquet-driven compact chiral photonic states
arXiv:2607.10415v2 Announce Type: replace-cross Abstract: The Aharonov-Bohm (AB) effect remains a cornerstone of fundamental and applied physics. In this work, we utilize the AB caging effect originated from an effective magnetic field induced by multiorbital interactions, creating an all flat band (FB) lattice system. Normally, FB states are known for being compact in space and having a zero tail; therefore, their mobility in a linear environment is generally understood as impossible. We propose a Floquet driving protocol in an all-FB photonic system to fully control the dynamics of localized photonic states. The modulation of the Hamiltonian along the propagation coordinate allows the translation of compact states in the direction of constructive interference, resulting in an effective stroboscopic quantum walk-like effect. We find that the traveling states exist in chiral pairs. We experimentally implement the Floquet driven protocol using femtosecond laser written photonic waveguides and demonstrate directional control of the propagation, determined by the relative phase of the input condition.
Abstract:The Aharonov-Bohm (AB) effect remains a cornerstone of fundamental and applied physics. In this work, we utilize the AB caging effect originated from an effective magnetic field induced by multiorbital interactions, creating an all flat band (FB) lattice system. Normally, FB states are known for being compact in space and having a zero tail; therefore, their mobility in a linear environment is generally understood as impossible. We propose a Floquet driving protocol in an all-FB photonic system to fully control the dynamics of localized photonic states. The modulation of the Hamiltonian along the propagation coordinate allows the translation of compact states in the direction of constructive interference, resulting in an effective stroboscopic quantum walk-like effect. We find that the traveling states exist in chiral pairs. We experimentally implement the Floquet driven protocol using femtosecond laser written photonic waveguides and demonstrate directional control of the propagation, determined by the relative phase of the input condition.
Optics (physics.optics); Quantum Physics (quant-ph)
arXiv:2607.10415 [physics.optics]
(or arXiv:2607.10415v2 [physics.optics] for this version)
https://doi.org/10.48550/arXiv.2607.10415 Focus to learn more arXiv-issued DOI via DataCite
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