Fig. 5: Photonic crystals with corresponding diffraction patterns.
From: Three-dimensional nanophotonics with spatially modulated optical properties
a 2D square lattice with periodicity a = 700 nm and cube width 0.5 a. Fluorescence image taken after conjugating the printed area with biotin-NHS particles and partial shrinking with MgCl2 (3-4x shrink ratio). The inset shows a bright field image of a crystal with a = 2.4 μm and cube width 0.4 a. The right panel shows the corresponding diffraction pattern. Scale bar for fluorescence image is 2 μm, and 5 μm for the bright field image. b 3D body-centered cubic (bcc) crystal with a = 2.4 μm
