Moreover, the enhancement ratio of the electric field in the graphene layer was demonstrated inFigure 5b to explain the mechanism of how the flower-shaped structure contributes to performanceimprovement. The Ef of graphene is 0 eV, and the frequency is 0.48 THz in the parameter settings.It was observed that the local field intensity near the metallic slits was enhanced, with an average of102 orders, compared with that of the control group. Further study showed that, accompanied by thegradual increasement in the Fermi level, the resonance coupling strength receded evidently.In conclusion, the proposed metamaterial can effectively strengthen the local electric intensityaround the SLG at the resonance frequency. Consequently, the dynamic modulation ability of SLGcan be magnified by the enhanced field. Therefore, the flower-shaped structure benefits the deepmodulation of THz transmittances by monolayer graphene.