title: Backward nonlinear surface Tamm states in left-handed metamaterials.
abstract: We addressed the existence of the nonlinear electromagnetic surface waves, the so-called Tamm states, that form at an interface separating a nonlinear uniform left-handed metamaterial and a conventional one-dimensional photonic crystal. We found two types of nonlinear surface waves, one with a hump at the interface and the other one with two humps. It was demonstrated that the nonlinear metamaterial can support the both type Tamm states with a backward energy flow and allows for a flexible control of the dispersion properties of surface states. We also, described the intensity-dependent properties of surface Tamm states for a nonlinear self-focusing medium.
authors.affiliation: Physics Department, Azarbaijan University of Tarbiat Moallem, Tabriz, Iran. namdar@azaruniv.edu
authors.forename: Abdolrahman
authors.initials: A
authors.lastname: Namdar
authors.forename: Samad
authors.initials: S
authors.lastname: Roshan Entezar
authors.forename: Habib
authors.initials: H
authors.lastname: Tajalli
authors.forename: Zahra
authors.initials: Z
authors.lastname: Eyni