A nickel vacancy defect in diamond is located between two boron-implanted regions (blue) that are electrically contacted to form a junction for charge state control. The defect is optically addressed by a laser.
From the article:
Lifetime-Limited and Tunable Emission from Single Charge-Stabilized Nickel Vacancy Centers in DiamondI. M. Morris, T. Lühmann, K. Klink, L. Crooks, D. Hardeman, D. J. Twitchen, S. Pezzagna, J. Meijer, S. S. Nicley, and J. N. Becker
Phys. Rev. Lett. 135, 043602 (2025)
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