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The active control of electromagnetically induced transparency (EIT)metamaterials (MM) has the potential to revolutionize communication networkswithout relying on quantum technology. However, current reconfigurable systemsoffer limited flexibility and have high fabrication costs and difficulties. Inthis study, we examine a classical EIT metamaterial and discover a novelmodulation mechanism that leverages mode coupling to dynamically adjust thebandwidth and group delay of the EIT MM. This mechanism is verified throughanalyses of the electric field and surface charge density distributions.Additionally, a robust coupled Lorentz oscillator model is used to explain thecoupling mechanism, with results that are in good agreement with simulationsand experiments. To capitalize on this mechanism, we propose a block-definitionapproach where the MM is divided into stretchable sections, allowing fordynamic modulation of the bandwidth and group delay by stretching the EIT MM.Furthermore, the fabrication process is highly compatible with traditionalflexible printed circuit board techniques. Our block-definition EIT MM offersunprecedented tunability and flexibility, requiring no complex components orspecialized materials, making it a promising candidate for tunable slow-wavedevices and other reconfigurable microwave applications.

Dynamic Modulation of Electromagnetically Induced Transparency Metamaterials through Mode Coupling and Stretchable Design