双光子共振光场同步调制荧光钠磁测量
Magnetometry using sodium fluorescence with synchronous modulation of two-photon resonant light fields
摘要：
我们报道了一种利用双光子共振光场同步调制产生磁共振的新技术。从钠细胞的荧光磁共振测量，以证明这种技术的适用性远程磁力。在存在横向磁场的情况下，产生其倾角对应于拉莫尔频率的强磁共振。观察到在3 Ω L处的附加共振，其可用于确定磁场取向。我们已经开发了一个基于密度矩阵方程的理论模型来验证我们的实验观察。使用35%至10%范围内的光占空比测量41 \mathbf{pT} / \sqrt{\mathbf{Hz}}的平均磁场灵敏度。我们已经讨论了可能的变化，可以进一步提高这一计划的灵敏度。
英文摘要：
We report a new technique for generating magnetic resonance with synchronous modulation of two-photon resonant light fields. Magnetic resonances in fluorescence from a sodium cell are measured to demonstrate suitability of this technique for remote magnetometry. A strong magnetic resonance with its dip corresponding to the Larmor frequency is produced in the presence of a transverse magnetic field. An additional resonance at 3\{Omega_L} is observed, which can be used to determine the magnetic field orientation. We have developed a theoretical model based on the density matrix equations to verify our experimental observations. An average magnetic field sensitivity of 41 \mathbf{pT}/\sqrt{\mathbf{Hz}} is measured using light duty cycles ranging from 35% to 10%. We have discussed possible changes that can be made to improve the sensitivity of this scheme further.
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