AI 中文总结
研究首次在实现三维修正Haldane模型的旋磁光子晶体中实验观测到反手性铰链态，其沿四条平行铰链非互易同向传播，将反手性拓扑扩展至高阶领域，为三维非互易拓扑光子器件提供新平台。
AI 中文摘要
拓扑物理学的最新进展揭示了一类反直觉的反手性边缘态与表面态，它们沿空间分离的平行边界向同一方向传播。然而迄今为止，反手性态的实验实现仅限于一阶拓扑相，其高阶对应物——反手性铰链态——仍未在实验中被观测到。本文中，我们报道了在旋磁光子晶体中首次实验观测到反手性铰链态，该光子晶体实现了具有二聚化层间耦合的三维修正Haldane模型。通过微波近场 mapping，我们直接解析出其核心特征：沿四条平行铰链的非互易同向传播输运，以及具有特征倾斜的铰链态色散。这些结果将反手性拓扑扩展到了高阶领域，并为三维非互易拓扑光子器件提供了新的平台。
英文摘要
Recent advances in topological physics have revealed a counterintuitive class of antichiral edge and surface states that propagate in the same direction along spatially separated parallel boundaries. To date, however, experimental realizations of antichiral states have been restricted to first-order topological phases, while their higher-order counterparts--antichiral hinge states--have remained experimentally elusive. Here, we report the first experimental observation of antichiral hinge states in a gyromagnetic photonic crystal that realizes a three-dimensional (3D) modified Haldane model with dimerized interlayer coupling. Through microwave near-field mapping, we directly resolve their defining signatures: nonreciprocal, co-propagating transport along four parallel hinges and characteristically tilted hinge-state dispersions. These results extend antichiral topology into the higher-order regime and provide a new platform for 3D nonreciprocal topological photonic devices.
