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Electric field distributions of the absorber with DLDGRAs at μc = 0.3 eV under normal incidence, where (a,c) are respectively the |E| for the TM polarization along the upper and lower graphene planes at the absorbance peak frequency of 6.81 THz; (b,d) are the |E| for the TE polarization along the upper and lower graphene planes at the absorbance peak frequency of 5.62 THz, respectively.
