Artículo de revista
Impurity modes and wave scattering in discrete chains with nonlinear defect states
Fecha
2006-01-30Registro en:
PHYSICS LETTERS A Volume: 350 Issue: 1-2 Pages: 134-137 Published: JAN 30 2006
0375-9601
Autor
Molina Gálvez, Mario
Vicencio Poblete, Rodrigo
Kivshar, Yuri S.
Institución
Resumen
We study the properties of localized impurity modes and the transmission of plane waves across a general nonlinear impurity embedded in an infinite one-dimensional linear chain. Using the formalism of the lattice Green function, we obtain nonlinear equations for the bound state energy and the transmission coefficient, for a wide class of nonlinear impurities. We specialize to a saturable nonlinear impurity, obtaining closed form expressions for the bound state energy and transmission coefficient.