Optimizing ultrasensitive single electron magnetometer based on nitrogen-vacancy center in diamond

被引：13
作者：
Wang PengFei
Ju ChenYong
Shi FaZhan
Du JiangFeng [1 ]
机构：
[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
来源：
CHINESE SCIENCE BULLETIN | 2013年 / 58卷 / 24期
基金：
中国国家自然科学基金;
关键词：
nitrogen-vacancy center; diamond; magnetometer; NUCLEAR-MAGNETIC-RESONANCE; AMBIENT CONDITIONS; SPIN COHERENCE; NANOSCALE; SENSOR;
D O I：
10.1007/s11434-013-5967-z
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The measurement of the weak magnetic field in nanoscale resolution and at room temperature is always a significant topic in biological, physical, and material science. Such detection can be used to decide the characterization of the samples, such as cells, materials, and so on. Nitrogen-vacancy (NV) center in diamond has been proved to be able to detect a magnetic field with nano Tesla sensitivity and nanometer resolution at room temperature. Here we experimentally demonstrate an optimized NV center based single electron magnetometer in a commercial diamond and under a home-built optically detected magnetic resonance (ODMR) microscope. With current technology, we change the optically detected time window to get a better signal to noise ratio, and use dynamical decoupling to increase the slope of magnetic field amplitude versus fluorescence signal. By employing the 8-pulse XY-4 dynamical decoupling sequence we achieve a sensitivity of 18.9 nT/, which is 1.7 times better than spin echo. We also propose a NV center based scanning diamond microscope for electron and nuclear spins detection as well as nanoscale magnetic resonance imaging. If it is realized, the NV center based magnetometry will have wide application in the future.
引用
收藏
页码：2920 / 2923
页数：4
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