Analogy of multi-band electromagnetically induced transparency metamaterial based on simple combination of split-ring resonators

We investigate, simulate, and measure triple-band electromagnetically induced transparency-like metamaterial with different shapes and sizes of split-ring resonators. It exhibits three high transmissivities at 8.19 GHz, 8.65 GHz, and 9.19 GHz which can be fitted by the equivalent circuit model. Meanwhile, this has high values of group delay at three transparency peaks, exhibiting an excellent slow-light effect. On the other hand, this is applied to design the multi-band refractive index sensor, exhibiting a favorable sensing property. The physics mechanism of transparency peaks is analyzed by the electric field distributions.

Automated summary

A triple-band electromagnetically induced transparency-like metamaterial was investigated, simulated, and measured using split-ring resonators of different shapes and sizes. The material exhibited high transmissivities at 8.19 GHz, 8.65 GHz, and 9.19 GHz, and showed a slow-light effect with high group delay values at the transparency peaks. The material was also applied for multi-band refractive index sensing, demonstrating favorable sensing properties, and the physics mechanism of transparency peaks was analyzed through electric field distributions.