论文标题
观察连续体中高阶拓扑结合状态
Observation of a higher-order topological bound state in the continuum
论文作者
论文摘要
高阶拓扑绝缘子是最近发现的一类材料，无论晶格的尺寸如何，都可以具有零维的局部状态。在这里，我们在实验上证明了高阶拓扑绝缘子的拓扑角度定位模式可以是对称性受保护的连续体的粘结状态。即使没有散装带隙，这些状态也不会与晶格的周围散装状态杂交。因此，这类结构在不支持完整的光子带隙的系统中限制和控制光中具有潜在的应用。
Higher-order topological insulators are a recently discovered class of materials that can possess zero-dimensional localized states regardless of the dimension of the lattice. Here, we experimentally demonstrate that the topological corner-localized modes of higher-order topological insulators can be symmetry protected bound states in the continuum; these states do not hybridize with the surrounding bulk states of the lattice even in the absence of a bulk bandgap. As such, this class of structures has potential applications in confining and controlling light in systems that do not support a complete photonic bandgap.
