Nonlinear lensing mechanisms in a cloud of cold atoms

Nonlinear lensing mechanisms in a cloud of cold atoms
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冷原子云中的非线性透镜机制

DOI:
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发表时间:
2007
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通讯作者:
R. Kaiser
R. Kaiser
中科院分区:
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文献类型:
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作者:
G. Labeyrie;G. Gattobigio;T. Chanelière;G. Lippi;T. Ackemann;R. Kaiser

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抽象的。 我们提出了一个实验研究的非线性透镜, 激光冷却的铷原子云产生的近共振光, 特别是为了理解相互作用的作用 光和原子蒸气之间的时间。我们确定了四个 不同的非线性机制,每一个都与不同的 时间常数:电子非线性,塞曼光泵浦, 超精细光泵浦和辐射压力。我们的观察 可以用一个简单的速率方程相当精确地再现 该模型允许直接讨论各种 方面的影响.结果对规划很重要 横向非线性光学的更精细的实验, 冷原子样品中的自组织
Abstract. We present an experimental study of nonlinear lensing of near-resonant light by a cloud of laser-cooled rubidium atoms, specifically aimed at understanding the role of the interaction time between the light and the atomic vapor. We identify four different nonlinear mechanisms, each associated with a different time constant: electronic nonlinearity, Zeeman optical pumping, hyperfine optical pumping and radiation pressure. Our observations can be quite accurately reproduced using a simple rate equation model which allows for a straightforward discussion of the various effects. The results are important for planning more refined experiments on transverse nonlinear optics and self-organization in samples of cold atoms.