GAUSSIAN-BEAM NONSPECULAR REFLECTION AT A NONLINEAR DEFOCUSING INTERFACE

Nonspecular reflection of a Gaussian beam impinging an interface betwe en linear and defocusing nonlinear Kerr medium is numerically investig ated. A composite nonspecular shift of the reflected beam is documente d for both local and nonlocal nonlinear interfaces and the nonspecular character of the beam-interface interaction is clearly shown. In anal ogy to previous studies on interfaces with focusing and local Kerr non linearities, and contrary to the results on interfaces with nonlocal d efocusing nonlinearity, no bistability in the parameters of the reflec ted beam is found. This is also confirmed by numerical simulations bas ed on iterative scheme with a memory effect introduced into the solvin g procedure.