Abstract The active controllable metasurfaces based on electromagnetically induced transparency (EIT) have attracted great interest in the research of terahertz functional devices. We demonstrate a dual-mode controllable terahertz metasurface based on complementary plasmon-induced reflection structure. Both photosensitive silicon and monolayer graphene are integrated into the unit cell to realize the active control of the EIT-like reflection window and the whole resonance, modulated by optical pumping and extra electrical voltage, respectively. The excellent properties of the modulation depth and the group delay highlight this metasurfaces in the applications of terahertz modulators and slow light devices. Moreover, this dual-mode modulation in one design provides a good way of commercial terahertz multi-functional devices.

中文翻译：

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用于多功能太赫兹器件的具有双模调制的等离子体诱导反射超表面

摘要 基于电磁感应透明（EIT）的主动可控超表面引起了太赫兹功能器件研究的极大兴趣。我们展示了一种基于互补等离子体诱导反射结构的双模可控太赫兹超表面。光敏硅和单层石墨烯都集成到晶胞中，分别通过光泵浦和额外电压调制，实现类 EIT 反射窗口和整个共振的主动控制。调制深度和群延迟的优异特性突出了这种超表面在太赫兹调制器和慢光设备的应用中的应用。此外，这种在一个设计中的双模调制为商用太赫兹多功能设备提供了一种很好的方式。