Quantum emitters in hexagonal boron nitride

Single photon emitters (SPEs) in hexagonal boron nitride (hBN) have emerged as robust sources of quantum light due to bright and high purity emission at room temperature. Progress in the fabrication, tuning, and integration of the emitters is discussed. Additionally, after years of debate over the structural origin of the emission, we present new experiments identifying the source of visible SPE emission in hBN, and the recent confirmation of spin selective transitions from multiple defect species.