论文标题
在退化的光学微腔中，三个状态之间的三阶特殊点和连续的切换
Third-order Exceptional Point and Successive Switching among Three States in a Degenerate Optical Microcavity
论文作者
论文摘要
开放系统最有趣的拓扑特征之一是表现出异常的点（EP）奇异性。除了广泛探索的二阶EP（EP2）之外，任何系统中高阶EP的探索都需要更复杂的拓扑结构，这仍然是一个挑战。在这里，我们在简单的制造可行的损失辅助光学微腔中首次遇到三阶EP（EP3）。使用散射矩阵形式主义，我们研究了两个EP2左右连续耦合状态之间的同时相互作用，这些状态产生EP3。遵循所确定的EP3周围的绝热参数变化，我们在三个耦合状态中提出了强大的连续体转换机制。拟议的计划确实打开了一个独特的平台来操纵集成设备中的光。
One of the most intriguing topological features of open systems is exhibiting exceptional point (EP) singularities. Apart from the widely explored second-order EPs (EP2s), the explorations of higher-order EPs in any system requires more complex topology, which is still a challenge. Here, we encounter a third-order EP (EP3) for the first time in a simple fabrication feasible gain-loss assisted optical microcavity. Using scattering-matrix formalism, we study the simultaneous interactions between three successive coupled states around two EP2s, which yield an EP3. Following an adiabatic parametric variation around the identified EP3, we present a robust successive-state-conversion mechanism among three coupled states. The proposed scheme indeed opens a unique platform to manipulate light in integrated devices.
