Abstract
The use of nonlinear optical phenomena for all-optical signal processing on-chip represents a potential solution to tackle the need for new-generation ultrafast and mass-producible devices for telecommunication, quantum, and sensing applications. In this chapter, we initially give a brief overview of the theoretical background of wave propagation in the presence of third-order optical nonlinearities. Various candidate material platforms, which have shown significant promise for applications in all-optical signal processing on chip, are outlined next, with a comparison of their linear and nonlinear properties. Finally, the chapter covers a brief presentation of some of the applications that are indicative of the potential of on-chip photonics in this application space.
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