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. 2020 Mar 13;11:1389. doi: 10.1038/s41467-020-15116-z

Fig. 3. Omnidirectional solar-thermal energy conversion capability of SGM absorber.

Fig. 3

a–c Angle-dependent absorption spectra of H2 SGM absorber with 30-nm graphene metamaterial film under a TE-polarized, b TM-polarized, and c unpolarized light, respectively. d–f Averaged absorbance over incident angles from 0° to 20° and 0° to 40° of d TE-polarized, e TM-polarized, and f unpolarized light. g, h The calculated g solar-to-thermal efficiencies and h overall efficiencies of H2 SGM absorber with a 30-nm graphene metamaterial film under TE-polarized, TM-polarized, and unpolarized light at various angles of incidence and the working situation of T0 = 298 K, TA = 1273 K, and C = 1000.