The concept of guiding light with light and negative third-order optical nonlinearities of organics

Dark spatial solitons can be used for generating light-induced waveguides and guiding light with light. A negative (self-defocusing) third-order nonlinearity is necessary to generate dark solitons. We show that the negative electronic nonlinearity is possible at 800 nm in several classes of organics including squaraine dyes, -conjugated polymers of poly(p-phenylenevinylene) type and polyaniline.

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