https://doi.org/10.1140/epjp/s13360-023-04797-2
Regular Article
Antichiral-like and antichiral edge states based on photonic Floquet lattices
1
School of Information Engineering, Guangdong University of Technology, 510006, Guangzhou, China
2
School of Electromechanical Engineering, Guangdong University of Technology, 510006, Guangzhou, China
3
School of Photoelectric Engineering, Guangdong Polytechnic Normal University, 510665, Guangzhou, China
c
szwstar@gdut.edu.cn
g
dengyaohua@gdut.edu.cn
h
kangxie@gdut.edu.cn
Received:
15
April
2023
Accepted:
13
December
2023
Published online:
23
December
2023
Photonic Floquet lattices provide an excellent platform for manipulating different topologically protected edge states. However, antichiral edge states have not been discussed much in Floquet lattices. Here, we propose a waveguide structure composed of two honeycomb Floquet photonic lattices rotating in opposite directions and find that the edge states propagate in the same direction on two opposite parallel zigzag boundaries of the system, thus achieving antichiral-like edge states. Furthermore, we propose a method to achieve smooth transition of the system without the artificial internal interface, thus eliminating the internal interface of the system, forming two co-propagating one-way transport channels at the system boundary, and discovering the antichiral edge states which are completely different from the well-studied topological edge states of chiral photonic systems. The long-distance propagation dynamics of the corresponding boundary states are numerically studied by comparing the intensity mode. In addition to their relevance for the topological properties of the Floquet lattice system, the results of this study may be applied to multi-channel optical switches, optical functional devices and other fields.
Junying Wang and Xifeng Ji have contributed equally to this paper.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
