Microscopic Study of Optically Stable Coherent Color Centers in Diamond Generated by High-Temperature Annealing

Single color centers in solid have emerged as promising physical platforms for quantum information science. Creating these with excellent properties is a key foundation further technological developments. In particular, the microscopic understanding of spin-bath environments to engineer control. this work, we propose and demonstrate distinct high-temperature annealing (HTA) approach creating high-quality nitrogen vacancy (N-V) implantation-free diamonds. Simultaneously using created N-V probes their local environment verify that no damage microscopically induced by HTA. Nearly all single ultralow-nitrogen-concentration membranes possess stable Fourier-transform-limited optical spectra. Furthermore, HTA strongly reduces noise sources naturally grown ensemble samples, leads more than threefold improvements decoherence time sensitivity. We also activation defect reformation, especially H3 P1 centers, can explain reconfiguration between spin baths centers. This will become powerful tool vacancy-based technology.