Single-crystal diamond is one example from an extensive list of materials—many with attractive optical properties—for which high-quality thin film heterolayer structures do not exist.

This illustration represents the atomic structure of a diamond lattice. Included is a Nitrogen (N) Vacancy (V) center. (Image: Wikimedia Commons ... main challenges is the scalable fabrication of high ...

Cubic boron nitride has a three-dimensional lattice structure and looks like a diamond at the molecular level ... In general, high-quality c-BN has been difficult to synthesize, whereas h-BN ...