Fig. 1. Schematic diagrams of metamaterial structural unit. (a) 3D structure; (b) overhead view

Fig. 2. Transmission spectra of graphene metamaterial structure and electric field distributions at different frequencies. (a) Transmission spectra; (b) electric field distribution of dark mode; (c) electric field distribution of entire structure at transmission peak; (d) electric field distribution of bright mode at transmission dip; electric field distributions of entire structure at (e) f₁ and (f) f₂

Fig. 3. Model based on CMT

Fig. 4. Variations of material transmission spectra and PIT at different Fermi levels. (a1)-(a4) Transmission spectra at different Fermi levels obtained by CMT and FDTD method; (b) evolution diagram of dips and peak of PIT at different Fermi levels; (c) 3D evolution diagram of PIT at different Fermi levels

Fig. 5. Theoretical design of photoelectric switch

Fig. 6. Group refractive index and phase shift at different Fermi levels. (a) E_F=0.7 eV; (b) E_F=0.8 eV; (c) E_F=0.9 eV; (d) E_F=1.0 eV