title: Graded-index profiles produced by ion exchange in an interacting system.
abstract: We numerically solve a diffusion-type equation for the accumulated interdiffusion coefficient in an interacting system (nonideal ion-exchange reaction) by using a modified Crank-Nicolson algorithm. We obtain exact and approximate index profiles in such a way that bump effects found in experimental ionic concentrations in glass are explained as a result of cation-cation interactions.
authors.affiliation: Area de Optica, Departamento de Fisica Aplicada, Facultade de Fisica e Escola Universitaria de Optica e Optometria, Universidade de Santiago de Compostela, E-15706 Santiago de Compostela, Galicia, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Liñares
authors.forename: K S
authors.initials: KS
authors.lastname: Krishna
authors.forename: M C
authors.initials: MC
authors.lastname: Nistal