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- Title
Highly Coherent Nitrogen‐Vacancy Centers in Diamond via Rational High‐Pressure and High‐Temperature Synthesis and Treatment.
- Authors
Zhang, Xiaoran; Liu, Kang‐Yuan; Li, Fengjiao; Liu, Xiaobing; Duan, Shuai; Wang, Jia‐Ning; Liu, Gang‐Qin; Pan, Xin‐Yu; Chen, Xin; Zhang, Ping; Ma, Yanming; Chen, Changfeng
- Abstract
The high‐pressure and high‐temperature (HPHT) diamonds with well‐controlled defects and low stress offer an ideal host substrate for the fields of quantum information science; however, fabrication of quantum‐grade HPHT diamonds remains a pressing challenge. Here, a major advance in generating highly coherent nitrogen‐vacancy (NV) centers, a promising spin defect in diamonds, via tailored HPHT synthesis and postgrown annealing treatment is reported. The resulting well‐dispersed single NV− centers in type‐IIa diamonds exhibit long spin coherence times comparable to that of the reported chemical vapor deposition diamonds. Moreover, high‐density NV− ensembles in 〈100〉‐grown type‐Ib diamonds with superb zero‐phonon lines considerably sharper than those of native NV− centers in as‐grown diamonds, together with low splitting of resonances are produced. These findings demonstrate a superior synthesis and optimization protocol for creating high‐quality NV− centers avoiding lattice damage in diamond to meet the stringent requirements for a wide range of emerging quantum technologies.
- Subjects
CHEMICAL vapor deposition; DIAMONDS; QUANTUM information science; JEWELRY stores; DIAMOND crystals
- Publication
Advanced Functional Materials, 2023, Vol 33, Issue 52, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202309586