Fig. 5
From: Programming emergent symmetries with saddle-splay elasticity
Periodic annular posts. a Schematic of annuli pattern, showing several periods. b Experimental observation and c simulation of 5CB on an array of touching annuli. An extended array of −1/2 defects forms and breaks the pattern symmetry. d–l Calculated director profiles (d, g, j) at the top of post, (e, h, k) simulated POM images and (f, i, l) director profiles throughout the the cell for W = 8 μJ/m2 and d–f \({K}_{24}/{K}_{22}=0.7\), g–i\({K}_{24}/{K}_{22}=1\) (the value that best agrees with experiment) and j–l \({K}_{24}/{K}_{22}=1.9\). m Simulated microscope images of 5CB on periodic annular posts as a function of saddle-splay constant \({K}_{24}/{K}_{22}\) and surface anchoring strength. The parameter pairing that best agrees with experiment is highlighted with a red box
