2006/04/24 by Mario I. Molina · 1 citation
Physics and Astronomy · #Advanced Fiber Laser Technologies #Nonlinear Photonic Systems #Strong Light-Matter Interactions #nlin.PS
paper · pdf · doi:10.1103/physrevb.74.045412
published as Phys. Rev. B 74, 045412 (2006) · 6 pages, 7 figures, submitted to PRB
arxiv created 2006/04/24 · openalex publication_date 2006/07/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We examine the formation of localized states on a generalized nonlinear impurity located at or near the surface of a semi-infinite two-dimensional (2D) square lattice. Using the formalism of lattice Green functions, we obtain in closed form the number of bound states as well as their energies and probability profiles, for different nonlinearity parameter values and nonlinearity exponents, at different distances from the surface. We specialize in two cases: an impurity close to an ``edge'' and an impurity close to a ``corner.'' We find that, unlike the case of a 1D semi-infinite lattice, in 2D, the presence of the surface helps in the formation of a localized state.