  Unprecedented material compatibility and ease of integration, in addition to
the unique and diverse optoelectronic properties of layered materials have
generated significant interest in their utilization in nanophotonic devices.
While initial nanophotonic experiments primarily focused on light-sources,
modulators, and detectors, recently researchers have demonstrated nonlinear
optical devices using layered materials. In this paper, we review the current
state of cavity-enhanced nonlinear optics with layered materials. Along with
conventional nonlinear optics related to harmonic generation, we report on
emerging directions of nonlinear optics, where the layered materials can
potentially play a significant role.
