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arXiv 2103.07358physics.atom-ph
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钠蒸气定向发射的远距离磁力测量法

Stand-off magnetometry with directional emission from sodium vapors

Rui Zhang, Emmanuel Klinger, Felipe Pedreros Bustos, Alexander Akulshin, Hong Guo, Arne Wickenbrock, Dmitry Budker

摘要:

间隔磁场测量允许在一定距离处测量磁场,并且可以用于地球物理研究、危险环境监测和安全应用。基于原子或分子的共振散射的远离磁场测量通常受到检测到的光的稀缺量的限制。如果激发态原子发出的光以定向方式向激发光源传播,情况将得到显著改善。在这里,我们证明,这是可能的,通过无反射镜激光。在一个桌面实验中,我们通过测量后向光来探测基态钠自旋在磁场影响下的自由旋进信号。这种方法能够在地球磁场范围内进行标量磁力测量,可以扩展到长基线传感。

英文摘要:

Stand-off magnetometry allows measuring magnetic field at a distance, and can be employed in geophysical research, hazardous environment monitoring, and security applications. Stand-off magnetometry based on resonant scattering from atoms or molecules is often limited by the scarce amounts of detected light. The situation would be dramatically improved if the light emitted by excited atoms were to propagate towards the excitation-light-source in a directional manner. Here, we demonstrate that this is possible by means of mirrorless lasing. In a tabletop experiment, we detect free-precession signals of ground-state sodium spins under the influence of a magnetic field by measuring backward-directed light. This method enables scalar magnetometry in the Earth field range, that can be extended to long-baseline sensing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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