Evanescent light-wave atomic funnel: A tandem hollow-fiber, hollow-beam approach
Evanescent light-wave atomic funnel: A tandem hollow-fiber, hollow-beam approach
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DOI：
10.1103/physreva.57.1957
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发表时间：
1998-03
影响因子：
2.9
通讯作者：
J. Yin;Yifu Zhu;Yu-zhu Wang
中科院分区：
文献类型：
--
作者：
J. Yin;Yifu Zhu;Yu-zhu Wang
我们提出了一种原子漏斗，它由一束发散的暗空心激光和一束倏逝光在一根短的微米级空心光纤中组成。从磁光阱中引出的冷原子在暗空心光束中经历了有效的西西弗斯冷却。计算了原子在倏逝光和暗空心光束中的导光势垒，分析了原子在导光和输运过程中的损失。计算结果表明，该系统的平衡三维均方根动量约为4. 5\ensuremath {\Elzxh}k$（温度约为2. 5\ensuremath {\sim}\mathrm{K}$），效率约为95%.利用这种漏斗方案可以产生低速强相干原子束，并简要讨论了它在原子光学中的潜在应用。
We propose an atomic funnel consisting of a dark hollow, divergent laser beam and an evanescent light in a short micron-sized hollow optical fiber. The cold atoms extracted from a magneto-optical trap experience effective Sisyphus cooling in the dark hollow beam. We calculate the potential barriers for atomic guiding in the evanescent light and the dark hollow beam, and analyze the atomic losses during the guiding and funneling process. Our results show that the equilibrium three-dimensional root-mean-square momentum of about $4.5\ensuremath{\Elzxh}k$ (temperature $\ensuremath{\sim}2.5\ensuremath{\mu}\mathrm{K}$) and the funneling efficiency of about 95% could be obtained. A low-velocity, intense coherent atomic beam can be generated in this funnel scheme and its potential applications in atom optics are briefly discussed.