Picotesla fiberized diamond-based AC magnetometer  

作　　者：SHAO-CHUN ZHANG YONG LIU LONG-KUN SHAN XUE-DONG GAO JIA-QI GENG CUI YU YANG DONG XIANG-DONG CHEN GUANG-CAN GUO FANG-WEN SUN 

机构地区：[1]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China [3]National Key Laboratory of ASIC,Hebei Semiconductor Research Institute,Shijiazhuang 050051,China [4]Electric Power Quantum Sensing Joint Laboratory of Anhui Province,State Grid Anhui Electric Power Research Institute,Hefei 230601,China [5]Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China

出　　处：《Photonics Research》2024年第6期1250-1261,共12页光子学研究（英文版）

基　　金：Fundamental Research Funds for the Central Universities(WK2030000062);Key Researchand Development Plan of Jiangsu Province(BE2022066-2);National Natural Science Foundation of China(12005218,52130510,62225506,62305324,62305324);CAS Project for Young Scientists in Basic Research(YSBR-049);Innovation Program for Quantum Science and Technology(2021ZD0303200)。

摘　　要：Portable quantum sensors are crucial for developing practical quantum sensing and metrology applications.Fiberized nitrogen-vacancy(NV)centers in diamonds have emerged as one of the most promising candidates for compact quantum sensors.Nevertheless,due to the difficulty of coherently controlling the ensemble spin and noise suppression in a large volume,it often faces problems such as reduced sensitivity and narrowed bandwidth in integrated lensless applications.Here,we propose a fluorescence signal treatment method for NV spin ensemble manipulation by the exponential fitting of spin polarization processes,instead of integrating the photon emission.This enables spin state readout with a high signal-to-noise ratio and applies to the pulse sensing protocols for large-volume NV spins.Based on this,we further developed a fiberized diamond-based AC magnetometer.With an XY8-N dynamical decoupling pulse sequence,we demonstrated a T_(2)-limited sensitivity of 8pT/√Hz and T_(1)-limited frequency resolution of 90 Hz over a wide frequency band from 100 kHz to 3 MHz.This integrated diamond sensor leverages quantum coherence to achieve enhanced sensitivity in detecting AC magnetic fields,making it suitable for implementation in a compact and portable endoscopic sensor.

关 键 词：MAGNETOMETER QUANTUM ENSEMBLE 

分 类 号：TM936[电气工程—电力电子与电力传动]