Abstract
Optical bistability is one of the fundamental physical phenomena that led foundation to numerous optical switching devices involving cavities or Fabry-Perot resonators, guided modes at nonlinear interfaces, four-wave mixing, etc (see, e.g., Ref. 1 and references therein). Bistable beam self-trapping and bistable solitons were first predicted by A. E. Kaplan4 for the scalar wave propagation described by the generalized nonlinear Schrödinger equation. However, for those bistable solitons to exist, the dependence of nonlinear susceptibility on the intensity of light should possess special properties, e.g., it should change its sign or its derivative should have a sufficiently sharp peak (a step-like function).2
© 1997 Optical Society of America
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