Abstract

A theoretical investigation is made of the optical waveguiding properties of thin films that exhibit an intensity-dependent refractive index. The results of a numerical calculation show that in a symmetric structure, there exist guided waves with symmetric field profiles, being the nonlinear analog of conventional guided modes. In addition, however, there exist asymmetric guided waves that are closely related to the surface waves supported at a single nonlinear interface. Such surface waves have been studied previously. The effect of structural asymmetry on nonlinear guided waves is also investigated.

© 1986 Optical Society of America

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