2026-10-12T00:34:36Z https://www.scidb.cn/oai

10.57760/sciencedb.0111w 2026-09-03T09:24:38Z

2026-09-03 Preparation and Optical Properties of Chromium Doped Diamond doi:10.57760/sciencedb.0111w en Diamond combines excellent mechanical, thermal, and optical properties with good biocompatibility, making it a core candidate functional material for cutting-edge quantum devices such as quantum precision sensing and single photon light sources. The research on traditional diamond nitrogen vacancy (NV) color centers is relatively mature, but there are inherent defects such as wide central emission spectra and sensitivity to environmental disturbances, which make it difficult to meet the performance requirements of the new generation of quantum devices. Developing new quantum defect color centers for transition metal doped diamond has become a research hotspot in the field of artificial crystals. Chromium (Cr), as a transition metal element, can introduce unique defect energy levels in the bandgap after doping into diamond, which is expected to construct a new type of quantum luminescent center. Most of the existing Cr doped diamonds are synthesized using high-temperature and high-pressure methods, which are prone to introducing catalyst impurities and difficult to control doping concentration; And ion implantation doping can cause serious irradiation lattice damage. Microwave plasma chemical vapor deposition (MPCVD) can achieve in-situ doping of diamond, effectively avoiding crystal damage caused by ion implantation, and the doping concentration is controllable, resulting in excellent crystal growth quality. However, there is still insufficient systematic research on the in-situ preparation of Cr doped diamond by MPCVD, and the influence of Cr doping on the optical properties of diamond is still unclear. Based on this, this article adopts MPCVD technology and uses hexacarbonyl chromium as the chromium source to achieve in-situ Cr doping of diamond single crystals through argon gas bubbling and heating sublimation. The surface of the prepared sample is smooth, and the Cr element is evenly distributed along the film thickness direction. The optical properties of the prepared sample were systematically studied by combining optical testing. The feasibility of in-situ preparation of Cr doped diamond single crystals by MPCVD has been verified, providing experimental basis for the development of Cr doped diamond quantum functional crystals. Cr-doped diamond; optical performance; In-situ doping Xia Jiaqi Zhang Shulong Zhao Chengchun Hang Yin RESTRICTED dataset Science Data Bank