Generation of atomic spin orientation with a linearly polarized beam in room-temperature alkali-metal vapor
Generation of atomic spin orientation with a linearly polarized beam in room-temperature alkali-metal vapor
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DOI：
10.1103/physreva.101.013436
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发表时间：
2020-01-30
影响因子：
2.9
通讯作者：
Chalupczak, W.
中科院分区：
文献类型：
--
作者：
Bevington, P.;Gartman, R.;Chalupczak, W.
传统上，原子自旋取向是通过从偏振光到原子系统的角动量转移来实现的。我们展示了室温铯蒸气中取向产生的机制，该机制结合了三个要素：光泵浦、非线性自旋动力学和自旋交换碰撞。通过自旋交换弛豫速率的变化，给出了取向原子样品与排列原子样品之间的跃迁。观测是通过监测原子无线电频谱来完成的。所讨论的测量配置为简单耐用的射频原子磁强计铺平了道路，该磁强计基于单个低功率激光二极管，接近多激光泵浦探测系统的性能。
Traditionally, atomic spin orientation is achieved by the transfer of angular momentum from polarized light to an atomic system. We demonstrate the mechanism of orientation generation in room-temperature caesium vapors that combines three elements: optical pumping, nonlinear spin dynamics, and spin-exchange collisions. Through the variation of the spin-exchange relaxation rate, the transition between an aligned and an oriented atomic sample is presented. The observation is performed by monitoring the atomic radio-frequency spectra. The measurement configuration discussed paves the way to simple and robust radio-frequency atomic magnetometers that are based on a single low-power laser diode that approach the performance of multilaser pump-probe systems.