Synthetic diamond as a new material for on-chip nonlinear wavelength converters

The emergence of synthetic diamond has enabled photonics researchers to start exploiting the unique optical properties of diamond for various applications. In this paper we numerically predict the performance of diamond ring waveguide structures for nonlinear wavelength conversion. After examining to what extent both dispersion-engineered phase-matching and "automatic" quasi-phase-matching can be established in diamond ring converters, we show that these phase matching approaches can yield high conversion efficiencies for a wide range of wavelengths in the near-infrared/mid-infrared domain, as well as in the ultraviolet/visible domain.