Chiral exceptional points (CEPs) have been shown to emerge in traveling wave resonators via asymmetric back scattering from two or more nano-scatterers. Here, we provide a new perspective on the formation of CEPs based on the coupled oscillator model. Our approach provides an intuitive understanding for the modal coalescence that signals the emergence of CEPs and emphasizes the role played by dissipation throughout this process. In doing so, our model also unveils an otherwise unexplored connection between CEPs and other types of exceptional points associated with parity-time symmetric photonic arrangements. In addition, our model also explains qualitative results observed in recent experimental work involving CEPs. Importantly, the tight-binding nature of our approach allows us to extend the notion of CEP to discrete photonics setups that consist of coupled resonator and waveguide arrays, thus opening new avenues for exploring the exotic features of CEPs in conjunction with other interesting physical effects such as nonlinearities and topological protections.

中文翻译：

---

手性特殊点的新观点及其在离散光子学中的应用

已经表明，手征例外点（CEP）通过两个或多个纳米散射体的不对称反向散射而出现在行波谐振器中。在这里，我们提供了基于耦合振荡器模型的CEP形成的新视角。我们的方法为模态合并提供了一种直观的理解，该信号表明了CEP的出现，并强调了在整个过程中耗散所起的作用。通过这样做，我们的模型还揭示了CEP和其他与奇偶时间对称光子排列相关的特殊点之间的其他方式无法探索的联系。此外，我们的模型还解释了最近涉及CEP的实验工作中观察到的定性结果。重要的，