Fig. 2: Optical properties and efficiencies of SGM absorbers. | Nature Communications

Fig. 2: Optical properties and efficiencies of SGM absorbers.

From: Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion

Fig. 2

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 (= 1 µm and = 30 nm) of SGM absorber.

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