Cooperative Lamb Shift in an Atomic Vapor Layer of Nanometer Thickness
Cooperative Lamb Shift in an Atomic Vapor Layer of Nanometer Thickness
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DOI：
10.1103/physrevlett.108.173601
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发表时间：
2012-04-23
影响因子：
8.6
通讯作者：
Adams, C. S.
中科院分区：
文献类型：
--
作者：
Keaveney, J.;Sargsyan, A.;Adams, C. S.
我们提出了一个实验测量的合作兰姆位移和洛仑兹位移使用纳米厚度的原子蒸气层与可调的厚度和原子密度。合作兰姆位移是由于相同原子之间的虚光子交换而产生的。前向和后向传播的虚场之间的干涉被确认的厚度依赖性的移位，其具有的空间频率等于两倍的光场。在一个易于扩展的系统中的合作相互作用的演示打开了大门，一个新的领域的非线性光学。
We present an experimental measurement of the cooperative Lamb shift and the Lorentz shift using a nanothickness atomic vapor layer with tunable thickness and atomic density. The cooperative Lamb shift arises due to the exchange of virtual photons between identical atoms. The interference between the forward and backward propagating virtual fields is confirmed by the thickness dependence of the shift, which has a spatial frequency equal to twice that of the optical field. The demonstration of cooperative interactions in an easily scalable system opens the door to a new domain for nonlinear optics.