Fig. 5From: Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons(a)–(e) show the gradual adjustment process for perfect absorption. Fermi energy of each layer of graphene (from bottom to top) are set as (a) [1] eV, (b) [1, 1, 1, 0.8, 1, 1, 1, 1, 1] eV, (c) [1, 1, 1, 0.8, 1, 1, 1, 0.9, 0.8] eV, (d) [1, 1, 1, 0.8, 0.8, 1, 1, 0.9, 0.8] eV, and (e) [0.9, 0.9, 1.1, 0.8, 0.8, 1.1, 1.1, 0.9, 0.8] eVBack to article page