Transistor action through nonlinear cascading in Type II interactions

Based on cascading through Type II second-harmonic generation, I show how all-optical amplitude modulation and switching can be obtained by utilizing an input wave at the fundamental frequency with unequal orthogonal spatial components. The proposed all-optical transistor/switch is insensitive to the inputs' relative phase, representing a step forward with respect to previously suggested configurations for transparent photonic networks.

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