We consider dielectric cavities whose radiation space is restricted by two parallel metallic planes. The TM solutions of the Maxwell equations of the system are equivalent to the solutions of periodical arrays of dielectric cavities. The system readily allows to achieve bound states in the continuum (BICs) of any type including topological BICs as dependent on position and orientation of the cavities relative to the planes and that extremely facilitates experimental studies in comparison to infinite arrays of the cavities. We show the effect of merging of topologically protected BICs that pushes the square asymptotic of the $Q$ factor into the power degree 4 or even 6.

中文翻译：

---

具有介电腔的金属波导中连续体束缚态的桌面实验室

我们考虑其辐射空间受两个平行金属平面限制的介电腔。系统麦克斯韦方程的TM解等价于介质腔周期阵列的解。该系统很容易实现任何类型的连续体 (BIC) 中的束缚态，包括取决于空腔相对于平面的位置和方向的拓扑 BIC，并且与空腔的无限阵列相比，这极大​​地促进了实验研究。我们展示了合并拓扑保护的 BIC 的效果，该效果推动了$问$功率等级 4 甚至 6 的因素。