Abstract

In this paper, we experimentally study the manipulation of the atomic spin polarization of rubidium atoms via optical pumping beams in resonance with both D₁ and D₂ transitions. In the presence of buffer and quenching gases, the D₁ pumping beam with σ⁺ polarization creates atomic spin polarization along the direction of the beam, while the D₂ pumping beam creates atomic spin polarization in the opposite direction. When the D₁ and D₂ pumping beams are simultaneously applied, the pumping processes caused by the two beams compete with each other since the D₁ and D₂ transitions share the same ground states. Here, we demonstrate that the resulting spin polarization of rubidium atoms is sensitive to the intensity and frequency of the D₁ and D₂ pumping beams. Furthermore, we show that the spin polarizations of two isotopes, ⁸⁵Rb and ⁸⁷Rb, can be independently manipulated with the combination of the D₁ and D₁ pumping beams. This provides a convenient method to create spin polarization of two isotopes of rubidium atoms in a selective manner, which may be useful in studying the spin dynamics of different isotopes in an atomic ensemble of natural abundance.

Graphical abstract

中文翻译：

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通过D 1和D 2光束的光泵浦操纵atoms原子的自旋极化

摘要

在本文中，我们通过实验研究了via原子在D ₁和D ₂跃迁共振下通过光泵浦光束对原子自旋极化的操纵。在存在缓冲气体和淬灭气体的情况下，具有σ ⁺极化的D ₁泵浦光束沿光束方向产生原子自旋极化，而具有D _2的泵浦光束沿相反方向产生原子自旋极化。当同时施加D ₁和D ₂抽运光束时，由于D，两个光束引起的抽运过程相互竞争₁和D ₂跃迁共享相同的基态。在这里，我们证明了the原子的自旋极化对D ₁和D ₂抽运光束的强度和频率敏感。此外，我们表明，可以通过D ₁和D ₁的组合独立地控制两个同位素⁸⁵ Rb和⁸⁷ Rb的自旋极化抽梁。这提供了一种方便的方法，可以有选择地创建两个atoms原子的自旋极化，这对于研究自然丰度原子集合中不同同位素的自旋动力学可能很有用。

图形概要