Figure 8
Example of FEM simulations of a metaunit (Px = Py = 600 nm) made of silicon nanopillars (Lx = 150 nm, Ly = 300 nm, and H = 850 nm, i.e., pillar #9 in Fig. 3) over a silicon substrate. (a) Boundary conditions imposed to properly simulate the nanostructure. PBC periodic boundary conditions. PML perfectly matched layers. (b–d) Electric field under TE polarization in input impinging from the air side. Lateral cross-sections at y = 0 (b), x = 0 (c), and top-view cross-section at z = H/4 (d). Input wavelength λ = 1310 nm. Colors refer to the intensity of the electric field (a.u.).
