Figure 1
From: Graphene-based metasurface solar absorber design with absorption prediction using machine learning

Graphene-based metasurface design (a) O-shape metasurface design top view having size L1 = 2.4 µm, L2 = 1 µm (b) O-shape metasurface design 3D view (c) O-shape metasurface design front view (d) O-shape metasurface design top view having size L3 = 2.4 µm, L4 = 2.2 µm (e) O-shape metasurface design 3D view (f) O-shape metasurface design front view. The overall area of the structure 3 × 3 µm2 The dimensions are not up to the scale.