Ultrasensitive SERF atomic magnetometer with a miniaturized hybrid vapor cell  

作　　者：Yintao Ma Yao Chen Mingzhi Yu Yanbin Wang Shun Lu Ju Guo Guoxi Luo Libo Zhao Ping Yang Qijing Lin Zhuangde Jiang 

机构地区：[1]State Key Laboratory for Manufacturing Systems Engineering,International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies,Xi’an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and Systems,Xi’an Jiaotong University,Xi’an 710049,China [2]School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an 710049,China [3]School of Instrument Science and Technology,Xi’an Jiaotong University,Xi’an 710049,China [4]Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing,Yantai,Yantai 265503,China

出　　处：《Microsystems & Nanoengineering》2024年第4期367-376,共10页微系统与纳米工程（英文）

基　　金：supported by the National Key Research&Development(R&D)Program of China(Grant No.2022YFB3203400);the National Natural Science Foundation of China(Grant No.62103324);the National Natural Science Foundation of China(Grant No.52305618);the Chongqing Natural Science Basic Research Project(cstc2021jcyj-msxmX0801).

摘　　要：The chip-scale hybrid optical pumping spin-exchange relaxation-free(SERF)atomic magnetometer with a single-beam arrangement has prominent applications in biomagnetic measurements because of its outstanding features,including ultrahigh sensitivity,an enhanced signal-to-noise ratio,homogeneous spin polarization and a much simpler optical configuration than other devices.In this work,a miniaturized single-beam hybrid optical pumping SERF atomic magnetometer based on a microfabricated atomic vapor cell is demonstrated.Although the optically thin Cs atoms are spinpolarized,the dense Rb atoms determine the experimental results.The enhanced signal strength and narrowed resonance linewidth are experimentally proven,which shows the superiority of the proposed magnetometer scheme.By using a differential detection scheme,we effectively suppress optical noise with an approximate five-fold improvement.Moreover,the cell temperature markedly affects the performance of the magnetometer.We systematically investigate the effects of temperature on the magnetometer parameters.The theoretical basis for these effects is explained in detail.The developed miniaturized magnetometer has an optimal magnetic sensitivity of 20 fT/Hz^(1/2).The presented work provides a foundation for the chip-scale integration of ultrahighly sensitive quantum magnetometers that can be used for forward-looking magnetocardiography(MCG)and magnetoencephalography(MEG)applications.

关 键 词：PUMPING POLARIZATION MAGNETOMETER 

分 类 号：TN40[电子电信—微电子学与固体电子学]