Fig. 6: Photonic crystals with corresponding diffraction patterns.
From: Three-dimensional nanophotonics with spatially modulated optical properties
a 2D hexagonal lattice crystal with primitive translation vector a = 4.5 μm. The right panel shows the corresponding diffraction pattern. b Twisted bi-layer hexagonal lattice forming a moiré crystal. Diffraction pattern with characteristic 12-fold symmetry of quasicrystal (right panel). Scale bars are 20 μm
