Anomalous π modes by floquet engineering in optical lattices with long-range coupling

Posted on 23.11.2022 - 14:23
Photonic Floquet topological insulators provide a powerful tool to manipulate the optical fields, which have been extensively studied with only nearest-neighbor coupling. Here, we demonstrate that nontrivial Floquet topological phase and photonic π modes are brought from long-range coupling in a one-dimensional periodically driven optical lattice. Interestingly, the long-range coupling is found to give rise to new Floquet π modes that do not exist in the traditional Floquet lattices. We interpret the underlying physics by analyzing the replica bands, which shows quasienergies band crossing and reopening of new nontrivial π gaps due to the long-range coupling. Our results provide a new route in manipulating optical topological modes by Floquet engineering with long-range coupling.

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Wu, Shengjie; Song, Wange; Lin, Zhiyuan; Chen, Chen; Zhu, Shining; Li, Tao (2022): Anomalous π modes by floquet engineering in optical lattices with long-range coupling. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.6282009.v2
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AUTHORS (6)

Shengjie Wu
Wange Song
Zhiyuan Lin
Chen Chen
Shining Zhu
Tao Li

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