The nonlinear response of an integrated optical device should take into account the propagation distance relevant to the device. In this paper, we present a CMOS-compatible integrated optical platform with an optimized nonlinear response for propagation lengths of tens of microns. The platform is based on a low-index thin film, interfaced with a silicon-on-insulator guiding layer. The experimental results enable the development of integrated optical networks with low-power nonlinear activation functions.
