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The current state-of-the-art of nonlinear optical materials suitable for ultrafast all-optical applications is discussed. This survey will include progress in the third-order nonlinear properties of semiconductors, polymers and glasses and examples of their applications to devices. Also discussed will be 'cascading', a second-order nonlinearity-based approach to all-optical effects.
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Stegeman et al. (1996) studied this question.
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