Wp. Lu et Sl. Lachinova, Formation and transition of labyrinthine domain patterns in a nonlinear optical system - art. no. 013807, PHYS REV A, 6301(1), 2001, pp. 3807
We report numerical and theoretical investigations of the formation and tra
nsition of domain patterns in a two-dimensional optical system with cosine-
type nonlinearity and a feedback loop. Labyrinthine stripe domain patterns
of the electric field are observed in the system, intiated from the Turing
instability. The labyrinths are found to undergo a transition to domain pat
terns of coexisting stripes and hexagons and disordered hexagon domains on
variation of the incident field intensity, a control parameter of the syste
m. The parameter regions for these domain structures are explained through
the existence and competition of stripes and hexagons in terms of their amp
litude equations. Moreover, the transition from straight stripes to labyrin
ths is investigated hy varying the feedback coupling coefficient of the sys
tem. The transition is shown to be the consequence of coexistence of and in
teraction between stripes and domain walls.