Figure 2
From: Spontaneous light-induced Turing patterns in a dye-doped twisted nematic layer

Stripe domain induced by photo-isomerization in a dye-doped twisted nematic liquid crystal cell. (a) Schematic representation of the twisted molecular configuration for a small portion of the unenlightened cell. (b) Experimental stripe domain induced by photo-isomerization of the dyes. (c) Schematic representation of an intermediate plane of the cell of the molecular configuration for a small portion of the enlightened cell.