Dependence of nitrogen vacancy color centers on nitrogen concentration in synthetic diamond  

作　　者：Yong Li Xiaozhou Chen Maowu Ran Yanchao She Zhengguo Xiao Meihua Hu Ying Wang Jun An 李勇;陈孝洲;冉茂武;佘彦超;肖政国;胡美华;王应;安军(Department of Physics and Electrical Engineering,Tongren University,Tongren 554300,China;School of Mechanical Electronic and Information Engineering,China University of Mining and Technology,Beijing 100083,China;School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]Department of Physics and Electrical Engineering,Tongren University,Tongren 554300,China [2]School of Mechanical Electronic and Information Engineering,China University of Mining and Technology,Beijing 100083,China [3]School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China

出　　处：《Chinese Physics B》2022年第4期534-537,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.12064038 and 52072113);the Natural Science Foundation of Guizhou Province Science and Technology Agency(Grant Nos.ZK[2021]019 and ZK[2021]031);the Outstanding Young Science and Technology Talents of Guizhou Pronice,China(Grant No.[2019]5673);the Open Project of Inner Mongolia Key Lab of High-pressure Phase Functional Materials(Grant No.cfxygy202004)。

摘　　要：Crystallization of diamond with different nitrogen concentrations was carried out with a FeNiCo-C system at pressure of 6.5 GPa.As the nitrogen concentration in diamond increased,the color of the synthesized diamond crystals changed from colorless to yellow and finally to atrovirens(a dark green).All the Raman peaks for the obtained crystals were located at about 1330 cm^(-1)and contained only the sp^(3)hybrid diamond phase.Based on Fourier transform infrared results,the nitrogen concentration of the colorless diamond was<1 ppm and absorption peaks corresponding to nitrogen impurities were not detected.However,the C-center nitrogen concentration of the atrovirens diamond reached 1030 ppm and the value of A-center nitrogen was approximately 180 ppm with a characteristic absorption peak at 1282 cm^(-1).Furthermore,neither the NV^(0)nor the NV^(-)optical color center existed in diamond crystal with nitrogen impurities of less than 1 ppm by photoluminescence measurement.However,Ni-related centers located at 695 nm and 793.6 nm were observed in colorless diamond.The NE8 color center at 793.6 nm has more potential for application than the common NV centers.NV^(0)and NV^(-)optical color centers coexist in diamond without any additives in the synthesis system.Importantly,only the NV^(-)color center was noticed in diamond with a higher nitrogen concentration,which maximized optimization of the NV^(-)/NV^(0)ratio in the diamond structure.This study has provided a new way to prepare diamond containing only NV^(-)optical color centers.

关 键 词：high pressure and high temperature DIAMOND nitrogen-vacancy color centers 

分 类 号：TQ163[化学工程—高温制品工业] O773[理学—晶体学]