计量学报2026，Vol.47Issue(7)：1003-1008,6.DOI:10.3969/j.issn.1000-1158.2026.07.08
基于激光偏振优化的NV色心测温性能提升方法
Method for Improving Temperature Measurement Performance of NV Centers in Diamond Based on Laser Polarization Optimization
摘要
Abstract
With the development of quantum precision measurement technology,the temperature measurement method of nitrogen-vacancy(NV)centers in diamond based on solid-state quantum spin is expected to break through the bottleneck of non-destructive microscopic temperature detection technology in biomedical and chip manufacturing fields,due to its merits of ultra-high precision,micro-nano scale,stable material properties and so on.However,the method to enhance the signal-to-noise ratio by applying high-power lasers or microwave lead to significant heating effects,thereby affecting the precision of temperature measurement.To avoid increasing the external field power,a method of optimizing the polarization direction of pumping laser is proposed to improve measurement performance.Firstly,the influence of laser polarization on the electron spin polarization ratio and fluorescence contrast is theoretically analyzed,and a light path which can adjust the polarization of pumping light is designed.Moreover,`experiments are conducted to investigate the variation of fluorescence contrast along the four NV axes as a function of laser polarization direction,the optimal polarization direction is selected for optimizing microwave power and temperature measurement sensitivity.Experimental results show that the proposed method effectively reduces the required microwave power,lowers thermal heating by～7 ℃ and enhances temperature sensitivity over threefold.关键词
量子温度计量/金刚石NV色心/激光偏振方向/电子自旋极化率/加热效应/测温灵敏度Key words
quantum thermometry/nitrogen-vacancy centers in diamond/polarization direction of laser/electron spin polarization ratio/heating effect/temperature measurement sensitivity分类
通用工业技术引用本文复制引用
李晓丽,张磊,邢力,咸秀超,王浩..基于激光偏振优化的NV色心测温性能提升方法[J].计量学报,2026,47(7):1003-1008,6.基金项目
国家自然科学基金(6250032234) （6250032234）
山东电力工程咨询有限公司科技项目(37-K2024-080) （37-K2024-080）
