Highly Coherent Nitrogen‐Vacancy Centers in Diamond via Rational High‐Pressure and High‐Temperature Synthesis and Treatment
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2023-09-13 |
| Journal | Advanced Functional Materials |
| Authors | Xiaoran Zhang, Kang‐Yuan Liu, Fengjiao Li, Xiaobing Liu, Shuai Duan |
| Institutions | Institute of Applied Physics and Computational Mathematics, University of Chinese Academy of Sciences |
| Citations | 16 |
Abstract
Section titled “Abstract”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.