Three-stage laser cooling of Sr atoms using the 5s5p $^3P_2$ metastable state below Doppler temperatures
Three-stage laser cooling of Sr atoms using the 5s5p $^3P_2$ metastable state below Doppler temperatures
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使用低于多普勒温度的 5s5p $^3P_2$ 亚稳态对 Sr 原子进行三级激光冷却
DOI：
10.1103/physreva.103.023331
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发表时间：
2021
影响因子：
2.9
通讯作者：
Masao Takamoto and Hidetoshi Katori “Optically guided atom interferometer tuned to magic wavelength”
中科院分区：
文献类型：
--
作者：
Tomoya Akatsuka,Koji Hashiguchi;Tadahiro Takahashi;Noriaki Ohmae;Masao Takamoto and Hidetoshi Katori “Optically guided atom interferometer tuned to magic wavelength”
本文报道了Sr原子的三阶段激光冷却，分别用基态和亚稳态，原子在磁光阱中预冷，同时在461 nm的-跃迁和496 nm的-跃迁上工作。光泵抽运到态的原子被磁光捕获，在-跃迁处被冷却到2.5（2）。利用这个跃迁，我们研究了具有简单能级而无超精细结构的原子的一维极化梯度冷却，冷却到0.22（18）或17倍的反冲温度。我们讨论了连续产生的超冷Sr原子结合状态转移技术的前景。
We report three-stage laser cooling of Sr atoms using theground state and themetastable state.atoms are precooled in a magneto-optical trap simultaneously operated on the–transition at 461 nm and on the–transition at 496 nm. Atoms optically pumped to thestate are magneto-optically trapped and cooled down to 2.5(2)on the–transition at. Using this transition, we investigate one dimensional polarization gradient cooling ofatoms, which have simple energy levels without hyperfine structure, down to 0.22(18)or 17 times the recoil temperature. We discuss prospects for continuous generation of ultracold Sr atoms combined with a state transfer technique.