In general, we have proposed an innovative dual-band plasmon-induced transparency (PIT) metamaterial (MM) consists of a metal cut-wire (CW) and a parallel cut-wire-pair (CWP) separated by a dielectric spacer, which behaves as a bright mode and multi-quasi-bright modes separately. The dual-band transparency widow can be observed in the microwave region due to the near-field coupling among the bright mode and multi-quasi-bright modes, numerically and experimentally investigated. It is found that a strong magnetic resonance has been introduced in our PIT structure due to the local magnetic interaction between the double-layered CWs; therefore, an extensive group index over 680 can be obtained. Finally, the dual-band PIT MM properties are investigated numerically and theoretically, using equivalent circuit model (ECM) and coupled oscillator model (COM), respectively.

总的来说，我们提出了一种创新的双带等离子体诱导透明 (PIT) 超材料 (MM)，由金属切割线 (CW) 和平行切割线对 (CWP) 组成，由介电间隔物隔开，其中分别表现为亮模式和多准亮模式。通过数值和实验研究，由于亮模式和多准亮模式之间的近场耦合，可以在微波区域观察到双波段透明寡妇。发现由于双层 CW 之间的局部磁相互作用，在我们的 PIT 结构中引入了强磁共振；因此，可以获得超过 680 的广泛组指数。最后，从数值和理论上研究了双波段 PIT MM 特性，