Fig. 4From: Tunable and Anisotropic Dual-Band Metamaterial Absorber Using Elliptical Graphene-Black Phosphorus PairsAbsorption spectra versus different doping levels under normal incidence: a and b for varied chemical potentials of graphene, c and d for varied carrier densities of BP, a and c for TE polarization, and b and d for TM polarization, where a = 62 nm, b = 100 nm, td = 1.35 μm, t = 5 nm, and P = 250 nmBack to article page