Figure 5
From: Broadband absorption using all-graphene grating-coupled nanoparticles on a reflector
(a) The absorption spectrum of our proposed absorber in Fig. 4 for the chemical potential set (0.95,1.4) (eV), (b) considering each graphene-based element of the unit cell individually and (c) in three cases, each containing only two of the graphene-based sections. The graphene-coated spheres are hollow and the relative permittivity of the substrate is 2. The geometrical parameters are W = 220 nm, G = 20 nm, R = 100 nm, d = 100 nm, and h = 1900 nm.
