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Physical Review A

Controllable synthesis of nitrogen-vacancy centers in diamond via heavy-ion irradiation

Anonymous, Han Mei, Lei Zhang, Hongjin Mou, Xinyue Li, Wenjing Liu, Can Zhao, Jinlong Guo, Cheng Shen, Yanxin Dou, Muhammad Jahangeer, Ning Gao, Peng Wang, Guanxiang Du, Jianyang Li, Guanghua Du

Published Jul 16, 2026• 0 citations
Publisher
DOI
10.1103/4tp4-ks9r

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•Sep 4, 2023•0 citations
We report depth-resolved photoluminescence measurements of nitrogen-vacancy (NV−) centers formed along the tracks of swift heavy ions (SHIs) in type Ib synthetic single crystal diamonds that had been doped with 100 ppm nitrogen during crystal growth. Analysis of the spectra shows that NV− centers are formed preferentially within regions where electronic stopping processes dominate and not at the end of the ion range where elastic collisions lead to the formation of vacancies and defects. Thermal annealing further increases NV yields after irradiation with SHIs preferentially in regions with high vacancy densities. NV centers formed along the tracks of single swift heavy ions can be isolated with lift-out techniques for explorations of color center qubits in quasi-1D registers with an average qubit spacing of a few nanometers and of order 100 color centers per micrometer along 10 to 30-μm-long percolation chains.
Femtosecond laser writing and ion irradiation have been demonstrated as powerful fabrication tools for integrated quantum photonics in diamond in article no. 1900006. The figure depicts femtosecond laser inscription and ion beam irradiation in diamond, which can be applied separately, or potentially together, to accurately form nitrogen vacancy (NV) center defects within synthetic diamond. The nitrogen (shown as yellow sphere)–vacancy (shown as light pink sphere) color center defect in the tetrahedral lattice of carbons (shown as black spheres) has emerged as a suitable candidate for a qubit (represented by the Bloch sphere above the diamond) for quantum information and field sensing applications. In addition, the article highlights the latest results on laser and ion beam irradiation fabrication of integrated photonic and microfluidic components in diamond for interfacing with NV centers.