Aa. Afanasev et al., SPONTANEOUS PATTERNS FORMATION IN THIN-FILM OF 2-LEVEL CENTERS WITH AWIDE-APERTURE OPTICAL FEEDBACK, Optics communications, 115(5-6), 1995, pp. 559-562
We present a thin film of two-level centers with a feedback mirror as
a new object for a spontaneous formation of hexagon patterns, which ca
n be perturbed by lattice penta-hepta defects. A spontaneous switching
between two bistable states, initiated by a patterns formation, is de
tected.