激光与微波功率对金刚石NV色心磁强计ESR谱线的影响研究  

Research on the Influence of Laser and Microwave Power on ESR Spectrum of the Diamond Nitrogen Vacancy Centre Ensemble Magnetometer

作　　者：高扬 徐超群[1] 黄魁[1] 高羽婷 刘超波[1] 武南开 刘明君 张超[1] 肖琦[1] 易忠[1] GAO Yang;XU Chaoqun;HUANG Kui;GAO Yuting;LIU Chaobo;WU Nankai;LIU Mingjun;ZHANG Chao;XIAO Qi;YI Zhong(Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China;China Academy of Space Technology,Beijing 100029,China)

机构地区：[1]北京卫星环境工程研究所,北京市100094 [2]中国空间技术研究院,北京市100029

出　　处：《北京理工大学学报》2021年第11期1222-1225,共4页Transactions of Beijing Institute of Technology

摘　　要：金刚石氮空穴色心磁强计广泛采用连续波光探测磁共振脉冲进行磁测,其灵敏度指标主要受到激光功率和微波功率影响.基于金刚石氮空穴色心系综搭建了一套共聚焦磁场检测系统,调节激光功率和微波功率测量相应的电子自旋共振谱的谱线半高宽和谱线对比度.实验表明,谱线半高宽主要受到微波功率影响,谱线对比度同时受到微波功率和激光功率影响;保持微波功率不变提高激光功率,观测到了明显的谱线半高宽变窄.系统的最优参数可分两步获得,首先调整微波功率获得较好谱线半高宽,再提高激光功率获得更好的对比度和谱线半高宽.Both laser power and microwave power have an important influence on the sensitivity of the diamond nitrogen-vacancy(NV)center ensemble magnetometer based on continuous-wave optically detected magnetic resonance(CW-ODMR)measurement pulse.A set of confocal magnetic field detection system was built based on the ensemble of the diamond NV center.By adjusting the laser power and microwave power,the full width at half maximum(FWHM)and contrast of the corresponding electron spin-resonance(ESR)spectrum could be measured.Experiments indicated that the FWHM of the spectrum was mainly affected by the microwave power,and the spectral contrast was affected by both microwave power and laser power.An obvious light narrowing of the FWHM was observed when the microwave power was constant and the laser power was increased.The optimal parameters of the system can be obtained in two steps.First,adjust the microwave power to get an applicable FWHM of the spectrum.Then increase the laser power to obtain a satisfactory contrast and FWHM of the spectrum.

关 键 词：磁强计 氮空穴(NV)色心 连续波光探测磁场共振 光致谱线收窄 灵敏度优化 

分 类 号：O411.2[理学—理论物理]