Figure 1
From: Wide-angle, wide-band, polarization-insensitive metamaterial absorber for thermal energy harvesting

The proposed metamaterial perfect absorber (MPA) structure (a) 3D isometric view, (b) top view showing the design parameters of the split-ring-resonator (SRR) and crossed ellipses, (c) Cross-sectional view of the MPA showing the metal–insulator-metal (MIM) 3-layers with thicknesses as design parameters. (ANSYS HFSS 2018, https://www.ansys.com/).