Over the past decade, the development of CMOS-compatible silicon technology has provided a novel platform for integrated nonlinear photonics, offering a path towards chip-scale devices for applications including spectroscopy, frequency metrology, and optical computing. The high optical confinement achieved in the silicon-based platform allows for large effective nonlinearities along with the ability to tailor the group-velocity dispersion of the device, which is essential for phase-matched parametric nonlinear interactions such as four-wave mixing. Here, we discuss nonlinear photonics applications based on silicon-nitride microresonators, including Kerr optical frequency combs and degenerate optical parametric oscillators for photonic spin glass.
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