[1] Allred J C, Lyman R N, Kornack T W et al. High-sensitivity atomic magnetometer unaffected by spin-exchange relaxation[J]. Physical Review Letters, 89, 130801(2002).

[2] Kominis I K, Kornack T W, Allred J C et al. A subfemtotesla multichannel atomic magnetometer[J]. Nature, 422, 596-599(2003).

[3] Dang H B, Maloof A C, Romalis M V. Ultrahigh sensitivity magnetic field and magnetization measurements with an atomic magnetometer[J]. Applied Physics Letters, 97, 151110(2010).

[4] Wyllie R, Kauer M, Wakai R T et al. Optical magnetometer array for fetal magnetocardiography[J]. Optics Letters, 37, 2247-2249(2012).

[5] Boto E, Meyer S S, Shah V et al. A new generation of magnetoencephalography: room temperature measurements using optically-pumped magnetometers[J]. NeuroImage, 149, 404-414(2017).

[6] Kornack T W, Ghosh R K, Romalis M V. Nuclear spin gyroscope based on an atomic comagnetometer[J]. Physical Review Letters, 95, 230801(2005).

[7] Brown J M, Smullin S J, Kornack T W et al. New limit on Lorentz- and CPT-violating neutron spin interactions[J]. Physical Review Letters, 105, 151604(2010).

[8] Savukov I M, Romalis M V. NMR detection with an atomic magnetometer[J]. Physical Review Letters, 94, 123001(2005).

[9] Patton B, Zhivun E, Hovde D C et al. All-optical vector atomic magnetometer[J]. Physical Review Letters, 113, 013001(2014).

[10] Seltzer S J, Romalis M V. Unshielded three-axis vector operation of a spin-exchange-relaxation-free atomic magnetometer[J]. Applied Physics Letters, 85, 4804-4806(2004).

[11] Dong H F, Fang J C, Zhou B Q et al. Three-dimensional atomic magnetometry[J]. The European Physical Journal Applied Physics, 57, 21004(2012).

[12] Huang H C, Dong H F, Chen L et al. Single-beam three-axis atomic magnetometer[J]. Applied Physics Letters, 109, 062404(2016).

[13] Xiao W, Wu Y L, Zhang X Z et al. Single-beam three-axis optically pumped magnetometers with sub-100 femtotesla sensitivity[J]. Applied Physics Express, 14, 066002(2021).

[14] Lu F, Lu J X, Li B et al. Triaxial vector operation in near-zero field of atomic magnetometer with femtotesla sensitivity[J]. IEEE Transactions on Instrumentation and Measurement, 71, 1501210(2022).

[15] Tang J J, Zhai Y Y, Cao L et al. High-sensitivity operation of a single-beam atomic magnetometer for three-axis magnetic field measurement[J]. Optics Express, 29, 15641-15652(2021).

[16] Cohen-Tannoudji C, Kastler A. I optical pumping[M]. Progress in optics, 1-81(1966).

[17] Happer W. Optical pumping[J]. Reviews of Modern Physics, 44, 169-249(1972).

[18] Shah V, Knappe S, Schwindt P D D et al. Subpicotesla atomic magnetometry with a microfabricated vapour cell[J]. Nature Photonics, 1, 649-652(2007).

[19] Zhao Q, Fan B L, Wang S G et al. A vector atomic magnetometer based on the spin self-sustaining Larmor method[J]. Journal of Magnetism and Magnetic Materials, 481, 257-261(2019).

[20] Yin Y, Zhou B Q, Yin K F et al. Comprehensive influence of modulated and bias magnetic fields on an atomic magnetometer[J]. Measurement Science and Technology, 32, 055004(2021).

[21] Jiménez-Martínez R, Knappe S, Grosz A, Haji-Sheikh M J, Mukhopadhyay S C. Microfabricated optically-pumped magnetometers[M]. High sensitivity magnetometers, 19, 523-551(2017).

[22] Mhaskar R, Knappe S, Kitching J. A low-power, high-sensitivity micromachined optical magnetometer[J]. Applied Physics Letters, 101, 241105(2012).