Enhanced Raman sideband cooling of caesium atoms in a vapour-loaded magneto-optical trap
Enhanced Raman sideband cooling of caesium atoms in a vapour-loaded magneto-optical trap
复制标题
蒸汽负载磁光陷阱中铯原子的增强拉曼边带冷却
DOI：
10.1088/1612-2011/12/5/055501
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发表时间：
2015-05-01
影响因子：
1.7
通讯作者：
Jia, S.
中科院分区：
文献类型：
--
作者：
Li, Y.;Wu, J.;Jia, S.
报道了铯(Cs)原子在标准单胞汽载磁光陷阱中的增强三维简并拉曼边带冷却(3DDrSc)。我们的改进方案包括使用单独的再泵浦激光器和优化的晶格失谐。我们将1.5×107个原子加载到拉曼晶格中，失谐量为−15.5 GHz(基态F=3)。用增强的3DDRSc在12ms内将它们从60µK冷却到1.7µK，得到的原子数约为1.2×107。提出了一个理论模型来模拟所测得的俘获原子数。计算结果与实验数据吻合较好。这项技术为将大量超冷Cs原子加载到交叉偶极陷阱中并在单电池系统中进行高效蒸发冷却铺平了道路。
We report enhanced three-dimensional degenerated Raman sideband cooling (3D DRSC) of caesium (Cs) atoms in a standard single-cell vapour-loaded magneto-optical trap. Our improved scheme involves using a separate repumping laser and optimized lattice detuning. We load 1.5 × 107 atoms into the Raman lattice with a detuning of −15.5 GHz (to the ground F = 3 state). Enhanced 3D DRSC is used to cool them from 60 µK to 1.7 µK within 12 ms and the number of obtained atoms is about 1.2 × 107. A theoretical model is proposed to simulate the measured number of trapped atoms. The result shows good agreement with the experimental data. The technique paves the way for loading a large number of ultracold Cs atoms into a crossed dipole trap and efficient evaporative cooling in a single-cell system.