We investigate the lateral displacement (Goos-Hänchen lateral shift) of a linearly polarized Gaussian beam
reflected from a corrugated surface between a conventional dielectric and a homogeneous isotropic metamaterial
with a negative index of refraction. We pay particular attention to effects associated with the resonant excitation
of surface plasmon polaritons. The dependence of the lateral displacement on the incident beam parameters is
examined in detail and discussed in different situations among which is the total reflection case. We compare these
characteristics with the limiting case of reflection of a beam from a surface with infinitely periodic corrugations.