Fig. 3
From: Large three-dimensional photonic crystals based on monocrystalline liquid crystal blue phases
Formation of large BPI single crystals by gradient-temperature scanning. a Schematic depiction of the GTS system. b Microscope image of a 3 mm-long BPI single crystal fabricated by 1D GTS (reflection; scale bar, 500 μm). Microscope images of a 1.2 × 0.7 × 0.3 mm3-sized BPI monocrystal by 2D GTS in the c reflection and d transmission modes, respectively (scale bars, 500 μm). e Kössel diagrams captured at different labeled regions of the single crystal. f Macroscopic view of the sample with mm-sized BPI monocrystals (reflection; scale bar, 3 mm)
