137967.fig.004a
(a)
137967.fig.004b
(b)
137967.fig.004c
(c)
137967.fig.004d
(d)
Figure 4: External refraction of a unit-amplitude ( ) spatial soliton at a nonlinear interface with and a quasi-paraxial incidence angle when . (a) Evolution in of the peak amplitude of the beam. (b), (c), and (d) show the full numerical solution of (5) when the nonlinearity exponent is , 2, and 3, respectively.