Figure 3
From: Kirchhoff’s metasurfaces towards efficient photo-thermal energy conversion
(a) Schematic illustrations of NDA and MHA type PPA structures. (b) Plot showing the relationship between disc (hole) diameter vs. period of the fabricated NDA and MHA structures. SEM insets in (b) depict each of the structures; scale bars are 1 μm. Color coding of the SEM images corresponds to the range of periods from 1.34 (black) to 1.65 μm (magenta), as in the rest of figures.
