We investigate the real-time estimation protocols for the frequency shift of optically detected magnetic resonance (ODMR) of nitrogen-vacancy (NV) centers in nanodiamonds (NDs). Efficiently integrating multipoint ODMR measurements and ND particle tracking into fluorescence microscopy has recently demonstrated stable monitoring of the temperature inside living animals. We analyze the multipoint ODMR measurement techniques (3-, 4-, and 6-point methods) in detail and quantify the amount of measurement artifact owing to several systematic errors derived from instrumental errors of experimental hardware and ODMR spectral shape. We propose a practical approach to minimize the effect of these factors, which allows for measuring accurate temperatures of single NDs during dynamic thermal events. We also discuss integration of noise filters, data estimation protocols, and possible artifacts for further developments in real-time temperature estimation. The present study provides technical details of quantum diamond thermometry and discusses factors that may affect the temperature estimation in biological applications.
Depth-Resolved Thermal Conductivity of HFCVD Diamond Films via Square-Pulsed Thermometry
School of Energy and Power Engineering, Huazhong University of Science and Technology（华中科技大学能源与动力工程学院）；Institute for Advanced Materials and Technology, University of Science and Technology Beijing（北京科技大学先进材料与技术研究院）；Shunde Graduate School, University of Science and Technology Beijing（北京科技大学顺德研究生院）；School of Energy and Power Engineering, Nanjing University of Science and Technology（南京理工大学能源与动力工程学院）
Diamond quantum-sensing platform with integrated boron-doped diamond microwave antenna and thermometer
School of Engineering, Institute of Science Tokyo（东京科学大学工程学院）；Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science（物质材料研究机构纳米结构研究中心）；Department of Mechanical and Electrical Systems Engineering, Kyoto University of Advanced Science (KUAS)（京都先端科学大学机电系统工程系）；National Institutes for Quantum Science and Technology (QST)（量子科学技术研究开发机构）；Graduate School of Science and Technology, Hirosaki University（弘前大学理工研究院）
Temporal filtered quantum sensing with the nitrogen-vacancy center in diamond
Beijing Academy of Quantum Information Sciences（北京量子信息科学研究院）；State Key Laboratory of Precision Spectroscopy, East China Normal University（精密光谱科学和技术国家重点实验室，华东师范大学）
