Abstract In this paper, we demonstrate a plasmon-induced transparency (PIT) sample based on a hybrid structure of a metasurface/BiFeO3/Si, which is theoretically and experimentally investigated in the terahertz range. A distinct transparency window can be available in the transmission spectra, which originates from the near-field coupling of two resonators. A modulation depth of 82% can be obtained at the transparency window through tuning the optical pumping power. The photo-excited carriers suppress the resonances of the two bright modes, then the transparency window of the PIT metasurface is nearly disappeared. This work provides a new perspective on exploring the multiferroic material BiFeO3 as well as expanding the practical applications of BFO-based functional devices in the terahertz range.

中文翻译：

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基于太赫兹范围内的 BiFeO3/Si 混合超表面主动操纵等离子体诱导的透明度

摘要 在本文中，我们展示了一种基于超表面/BiFeO3/Si 混合结构的等离子体诱导透明 (PIT) 样品，该样品在太赫兹范围内进行了理论和实验研究。透射光谱中可以使用不同的透明窗口，这源于两个谐振器的近场耦合。通过调节光泵浦功率，可以在透明窗口处获得 82% 的调制深度。光激发载流子抑制了两种明亮模式的共振，然后 PIT 超表面的透明窗口几乎消失了。这项工作为探索多铁性材料 BiFeO3 以及扩展基于 BFO 的功能器件在太赫兹范围内的实际应用提供了新的视角。