标题： 纳米尺度系统中远场辐射和偏振奇点的拓扑光子学 显示英文标题

标题： Topological photonics in nanoscaled systems with far field radiation and polarization singularities

摘要： 拓扑学是一种强大的框架，用于控制和操纵光，最小化对光子性质的有害扰动。 将纳米光子学与拓扑概念相结合，为基础物理和技术应用提供了机会。 尽管大多数拓扑光子实现都是受到凝聚态物质类比模型的启发，但新的拓扑思想才刚刚开始在纳米尺度上实现。 纳米光子学以微妙的现象为特征，这些现象通常不在其他拓扑模型的实现中被考虑，例如非局部性、强场限制以及光辐射到远场连续体。 在这一观点中，我们将讨论光子晶体的标准拓扑带理论需要通过一种更全面的方法进行扩展，该方法能够正确处理这些纳米光子固有效应，特别是偏振和远场辐射之间的相互作用。 我们强调偏振奇点可能在定义远场中的拓扑不变量中发挥的新兴作用，这些不变量仅靠体观测量是无法完全捕捉的。 最后，我们概述了一组开放问题和探索拓扑纳米光子学新概念以及塑造下一代光子器件的有前景的方向。 显示英文摘要

摘要： Topology is a powerful framework for controlling and manipulating light, minimizing detrimental perturbations on the photonic properties. Combining nanophotonics with topological concepts presents opportunities for both fundamental physics and technological applications. Although most topological photonic realizations have been inspired by condensed-matter analogue models, new topological ideas have just begun to be realized at the nanoscale. Nanophotonics is characterized by subtle phenomena that are not usually considered in other topological models' realizations, such as nonlocality, strong field confinement, and light radiating to the far-field continuum. In this perspective, we will discuss how standard topological band theory for photonic crystals needs to be extended by a more comprehensive approach that properly treats such nanophotonic intrinsic effects and, in particular, the interplay of polarization and far-field radiation. We highlight the emerging role that polarization singularities might play in defining the topological invariants in the far field, which are not fully captured by bulk observables alone. We conclude by outlining a set of open questions and promising directions for exploring novel concepts in topological nanophotonics and shaping next-generation photonic devices.