Figure 2
From: A multiband perfect absorber based on hyperbolic metamaterials
Reflectance spectra at different angles of incidence for (a) Au GC-Au/Al2O3 HMM, (b) Pd GC-Ag/TiO2 HMM, (c) 20 nm thick Au grating on an Al2O3/ glass and (d) 8 nm thick Pd grating on a TiO2/ glass.
