Fig. 2: Optical properties and efficiencies of SGM absorbers.
a, b Simulated a electric field intensity distributions and b absorbance map of incident light at various wavelengths (800, 1150, and 1450 nm) passing through the H2 SGM absorber. c Absorption spectra for SGM absorber featuring w = 0.59 µm, p = 0.8 µm, and t = 30 nm as a function of depth of trenches and wavelength. d, e Calculated d solar-to-thermal efficiencies and e overall efficiencies of the SGM absorber featuring w = 0.59 µm and p = 0.8 µm as a function of thickness of the graphene metamaterial (GM) layer and depth of trenches at T0 = 298 K, TA = 1273 K, and C = 1000. Circled red star indicates the optimized structural parameters (d = 1 µm and t = 30 nm) of SGM absorber.
