Figure 6
From: Broadband absorption using all-graphene grating-coupled nanoparticles on a reflector
The electric field distributions at three frequencies for the absorber with the chemical potential set of (0.95, 1.4) eV (a–c) 25 THz (d–f) 30 THz and (g–i) 37 THz. 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.
