A hybrid metamaterial based on a metal-solid-state plasma (SSP) structure has been demonstrated, which actively controls the transparency window by introducing the SSP. The unit cell consists of square patch with a slot and metal cut wire (CW) with SSPs embedded. The designing of a resonant frequency tuning is intrinsically more difficult than amplitude modulation, which has been extensively researched. By introducing SSP and sophisticated structural design, the frequency shifts 403 GHz when the structure switches between two states. The transmission window is switched by changing the state of SSP, allowing for a dynamical group delay of the terahertz frequency. The linearly coupled Lorentz oscillator model is utilized to explore the underlying mechanism of the actively tunable electromagnetically induced transparency behavior between the bright and bright modes. We provide fascinating possibilities for innovative optical components in certain areas, including ultrafast switching, sensing, and terahertz active filtering. |
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Surface plasmons
Metamaterials
Transparency
Terahertz radiation
Modulation
Plasma
Solid state physics