The authors show that investigations on the stability of nonlinear waves guided by planar structures greatly benefit when the conditions of marginal stability are considered on a suitable restricted parameter space. Relevant information is summarized in a few diagrams, so that waveguiding properties can be immediately read off from them, and critical power-independent values of the waveguide parameters to ensure stable TE0 propagation are obtained for a particular structure.
Torner, L., Juan P. Torres, Mihalache, D., Baboiu , D., Mazilu, D. On the stability of TE0 waves guided by thin films bounded by a nonlinear medium. "Pure and applied optics", Febrer 1993, vol. 2, núm. 1, p. 235-242.