Prediction and Observation of Robust One-Way Bulk States in a Gyromagnetic Photonic Crystal,Physical Review Letters

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Prediction and Observation of Robust One-Way Bulk States in a Gyromagnetic Photonic Crystal
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-06-21 , DOI: 10.1103/physrevlett.128.257401
Jianfeng Chen ₁ , Zhi-Yuan Li _{1,

2}

Affiliation

We report a two-dimensional heterogeneous Haldane model composed of alternately stacking modified Haldane lattices with opposite next-nearest-neighbor hoppings, and predict the emergence of robust one-way bulk states by an ab initio theoretical calculation. These unique bulk states transport unidirectionally and are robust against backscattering from impurities in the strip bulk. By analogy with the heterogeneous Haldane model, we further confirm by numerical simulations and experimental measurements the existence of robust one-way bulk states in a two-dimensional microwave gyromagnetic photonic crystal, and demonstrate their robust one-way property over a long-distance even in the presence of metallic obstacles. Our study provides the strong support for the generalization and application of band theories to fermionic and bosonic systems, and paves a way for the implementation of high-throughput robust energy transmission materials and devices.

中文翻译：

旋磁光子晶体中鲁棒单向体态的预测和观测

我们报告了一个二维异质霍尔丹模型，由交替堆叠的修改霍尔丹晶格和相反的下一个最近邻跳跃组成，并通过从头算预测鲁棒单向体态的出现理论计算。这些独特的体态单向传输，并且对带状体中杂质的反向散射具有鲁棒性。通过与异质霍尔丹模型的类比，我们通过数值模拟和实验测量进一步证实了二维微波旋磁光子晶体中鲁棒的单向体态的存在，并证明了它们在长距离甚至在存在金属障碍物的情况下。我们的研究为能带理论在费米子和玻色子系统中的推广和应用提供了强有力的支持，并为高通量鲁棒能量传输材料和器件的实现铺平了道路。

更新日期：2022-06-21

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