Fig. 1. Structural diagram of metamaterial absorber based on graphene-metal hybrid. (a) Top view of unit structure; (b) front view of structure

Fig. 2. Conductivity cures of graphene with different Fermi levels

Fig. 3. Absorptivity curves of different structures. (a) Single metal cross structure, single graphene structure, and graphene-metal hybrid structure; (b) metamaterial absorbers with different Fermi levels

Fig. 4. Absorptivity curves under different graphene widths

Fig. 5. Schematic of unit structure of broadband metamaterial absorber based on graphene-metal hybrid structure

Fig. 6. Absorptivity curves of broadband metamaterial absorbers with different Fermi levels

Fig. 7. Field distributions of metamaterial absorber when graphene Fermi level is 0 eV. (a) Surface current, graphene-metal hybrid structure; (b) surface current, metal substrate; (c) electric field, graphene-metal hybrid structure

Fig. 8. Field distributions of metamaterial absorbers with different structures when graphene Fermi level is 0 eV. (a) Single metal cross structure; (b) single graphene structure; (c) graphene-metal hybrid structure

Fig. 9. Field distributions of metamaterial absorber when graphene Femi level is 0.3 eV. (a) Surface current, graphene-metal hybrid structure; (b) surface current, metal substrate; (c) electric field, graphene-metal hybrid structure

Fig. 10. Field distributions of metamaterial absorber under different frequencies when graphene Fermi level is 0 eV. (a) 28 GHz; (b) 32 GHz