Coherent scattering of near-resonant light by a dense, microscopic cloud of cold two-level atoms: Experiment versus theory
Coherent scattering of near-resonant light by a dense, microscopic cloud of cold two-level atoms: Experiment versus theory
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致密、微观的冷两能级原子云对近共振光的相干散射：实验与理论
DOI：
10.1103/physreva.97.053816
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发表时间：
2018
影响因子：
2.9
通讯作者：
P. Pillet
中科院分区：
文献类型：
--
作者：
S. Jennewein;L. Brossard;Y. Sortais;A. Browaeys;P. Cheinet;J. Robert;P. Pillet
我们测量了激光冷却的两能级铷原子云对低强度、近共振光的相干散射，这些铷原子的大小与光的波长相当。我们通过施加300g的磁场分离出一个两能级的原子结构。我们测量了激光的各种失谐和原子序数范围从5到100的云的时间和稳态相干光学响应。我们将我们的结果与微观耦合偶极子模型和多模傍轴麦克斯韦-布洛赫模型进行了比较。在低强度状态下，两个模型非常一致，从而验证了麦克斯韦-布洛赫模型。与数据比较，发现模型在相对较低密度（n/ k30.1）下非常一致，而在较高密度下开始出现显著偏差。这种分歧表明，即使在原始的实验条件下，致密冷原子群中的光散射仍然不能定量地理解。
We measure the coherent scattering of low-intensity, near-resonant light by a cloud of laser-cooled two-level rubidium atoms with a size comparable to the wavelength of light. We isolate a two-level atomic structure by applying a 300 G magnetic field. We measure both the temporal and the steady-state coherent optical response of the cloud for various detunings of the laser and for atom numbers ranging from 5 to 100. We compare our results to a microscopic coupled-dipole model and to a multi-mode, paraxial Maxwell-Bloch model. In the low-intensity regime, both models are in excellent agreement, thus validating the Maxwell-Bloch model. Comparing to the data, the models are found in very good agreement for relatively low densities (n/k 3 0.1), while significant deviations start to occur at higher density. This disagreement indicates that light scattering in dense, cold atomic ensembles is still not quantitatively understood, even in pristine experimental conditions.
影响因子：
8.6
作者：
Keaveney, J.;Sargsyan, A.;Adams, C. S.
通讯作者：
Adams, C. S.