Dual-Mode On-to-Off Modulation of Plasmon-Induced Transparency and Coupling Effect in Patterned Graphene-Based Terahertz Metasurface

摘要

Schematic of the 3 × 3 unit structure of the PIT metasurface. The modulated diagram of gate voltage. Top view of structural unit with geometric parameters = 6.0 μm, = 4.0 μm, = 1.0 μm, = 1.4 μm, = = 0.8 μm, = 2.9 μm, and = 1.55 μm. Coupling diagram between the graphene ribbon and the graphene strip