Figure 7
From: Broadband absorption using all-graphene grating-coupled nanoparticles on a reflector
The absorption spectrum of the proposed structure in Fig. 4 for (a) TE and (b) TM modes for oblique incidence considering the chemical potential set of (0.95, 1.4) eV for biasing. 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.
