Observation and cancellation of a perturbing dc stark shift in strontium optical lattice clocks
Observation and cancellation of a perturbing dc stark shift in strontium optical lattice clocks
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DOI：
10.1109/tuffc.2012.2209
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发表时间：
2011-08
期刊：
影响因子：
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通讯作者：
J. Lodewyck;M. Zawada;L. Lorini;M. Gurov;P. Lemonde
中科院分区：
文献类型：
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作者：
J. Lodewyck;M. Zawada;L. Lorini;M. Gurov;P. Lemonde
我们报道了通过比较两个锶光学晶格钟，在10-13能级上观测到的直流斯塔克频移。这种频移是由于在靠近原子样品的真空下放置的介电表面上存在电荷而引起的。我们证明了这些电荷可以通过照射在介质表面的紫外光来消除，并通过外加电场在10-18能级的时钟跃迁上表征了剩余的DC-Stark频移。这项研究表明，直流斯塔克漂移在晶格钟的精度预算中起着重要的作用，应该得到充分的考虑。
We report on the observation of a dc Stark frequency shift at the 10-13 level by comparing two strontium optical lattice clocks. This frequency shift arises from the presence of electric charges trapped on dielectric surfaces placed under vacuum close to the atomic sample. We show that these charges can be eliminated by shining UV light on the dielectric surfaces, and characterize the residual dc Stark frequency shift on the clock transition at the 10-18 level by applying an external electric field. This study shows that the dc Stark shift can play an important role in the accuracy budget of lattice clocks, and should be duly taken into account.