  We demonstrate the fabrication of large-scale arrays of single photon
emitters (SPEs) in hexagonal boron nitride (hBN). Bottom-up growth of hBN onto
nanoscale arrays of dielectric pillars yields corresponding arrays of hBN
emitters at the pillar sites. Statistical analysis shows that the pillar
diameter is critical for isolating single defects, and diameters of ~250 nm
produce a near-unity yield of a single emitter at each pillar site. Our results
constitute a promising route towards spatially-controlled generation of hBN
SPEs and provide an effective and efficient method to create large scale SPE
arrays. The results pave the way to scalability and high throughput fabrication
of SPEs for advanced quantum photonic applications.
