Fig. 1. Structural of metamaterial absorption unit

Fig. 2. Absorption spectra of different graphene structures

Fig. 3. Simulated absorption coefficients of different parameters under normal incidence

Fig. 4. Electric field distribution at absorption peaks of different graphene structures

Fig. 5. Surface current distribution and electric field distributions of the absorber in yoz plane of absorber at two different resonance frequencies

Fig. 6. Absorption spectra of absorber under different Fermi levels

Fig. 7. Absorption spectra under different polarization angles

Fig. 8. Dependence of absorption spectrum on incident angle under different polarization modes