We propose a Fano switch arising from the superlattice array of a plasma-filled quartz tube, which can be tuned and reconfigured by the plasma density in the tube. The generation of the switch depends on a Fano band that is induced by the interference between the Mie resonance in an isolated cylinder and Bragg scattering in a periodic array. The underlying dispersion characteristics reveal that a localized tunable flat band corresponding to the Mie resonance plays an important role in the appearance of the Fano resonance. This active tunable switch can be potentially applied to microwave communications as a single-pole multi-throw switch and to monitor environmental variables that impact the plasma density.

我们提出了一种由充满等离子体的石英管的超晶格阵列产生的 Fano 开关，它可以通过管中的等离子体密度进行调整和重新配置。开关的产生取决于由孤立圆柱体中的米氏共振和周期性阵列中的布拉格散射之间的干扰引起的法诺带。潜在的色散特性表明，对应于 Mie 共振的局部可调平坦带在 Fano 共振的出现中起着重要作用。这种有源可调开关有可能作为单刀多掷开关应用于微波通信，并监测影响等离子体密度的环境变量。