Nonlinear lensing mechanisms in a cloud of cold atoms
Nonlinear lensing mechanisms in a cloud of cold atoms
复制标题
冷原子云中的非线性透镜机制
DOI:
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发表时间:
2007
期刊:
影响因子:
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通讯作者:
R. Kaiser
中科院分区:
文献类型:
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作者:
G. Labeyrie;G. Gattobigio;T. Chanelière;G. Lippi;T. Ackemann;R. Kaiser
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.