LAUSR

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.