Deterministically-Writing Quantum Emitters in Multi-Layered hBN at Room Temperature

Atomically-thin van der Waals hexagonal boron nitride (hBN) has emerged as a promising material candidate for hosting room temperature single-photon emitters (SPEs) for next-generation quantum technologies. Precise and robust control of creation, location and repeatability of the SPEs independent of the substrate are important advances. Here, we present a fabrication method for creating and deterministically placing quantum emitters in multi-layered hBN via combination of mechanical stress and thermal activation. Upon application of mechanical stress using an atomic force microscope tip, the hBN deforms while placed on a polymer film, resulting in tears on the edge of the indent. These tear sites are then activated through a thermal annealing process, giving rise to room temperature SPEs in the hBN. These findings provide a general methodology for activating SPEs in two-dimensional materials with on-demand precision and providing a platform for realizing physical phenomena through defect engineering.

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