Configurable topological beam splitting via antichiral gyromagnetic photonic crystal
Journal Title: Opto-Electronic Science - Year 2022, Vol 1, Issue 5
Abstract
Antichiral gyromagnetic photonic crystal (GPC) in a honeycomb lattice with the two interpenetrating triangular sublattices A and B magnetically biased in opposite directions can realize antichiral one-way edge states propagating along the same direction at its two parallel edges. Here, we report the construction and observation of topological beam splitting with the easily adjustable right-to-left ratio in an antichiral GPC. The splitter is compact and configurable, has high transmission efficiency, and allows for multi-channel utilization, crosstalk-proof, and robust against defects and obstacles. This magnificent performance is attributed to the peculiar property that antichiral one-way edge states exist only at zigzag edge but not at armchair edge of antichiral GPC. When we combine two rectangular antichiral GPCs holding left- and right-propagating antichiral one-way edge states respectively, bidirectionally radiating one-way edge states at two parallel zigzag edges can be achieved. Our observations can enrich the understanding of fundamental physics and expand topological photonic applications.
Authors and Affiliations
Jianfeng Chen, Zhi-Yuan Li,
Keywords
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- EP ID EP704580
- DOI 10.29026/oes.2022.220001
- Views 76
- Downloads 0
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