Atom-Based Radio-Frequency Field Calibration and Polarization Measurement Using Cesium nD(J) Floquet States
Atom-Based Radio-Frequency Field Calibration and Polarization Measurement Using Cesium nD(J) Floquet States
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基于原子的射频场校准和偏振测量
DOI：
10.1103/physrevapplied.8.014028
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发表时间：
2017
影响因子：
4.6
通讯作者：
Jia Suotang
中科院分区：
文献类型：
--
作者：
Jiao Yuechun;Hao Liping;Han Xiaoxuan;Bai Suying;Raithel Georg;Zhao Jianming;Jia Suotang
在室温蒸汽池中，利用铯里德堡-原子电诱导透明，研究了100 mhz线极化射频场的原子电场校准和极化测量。该标定方法基于将实验数据与理论Floquet模型的结果进行匹配。所利用的精细结构Floquet能级表现出相互依赖的ac Stark位移和分裂，并且它们发展出偶阶rf调制边带。铯精细结构态的Floquet图显示了不同的非射频耦合态之间的一系列精确交叉。这些精确的平交道口被用来对射频电场进行快速而精确的校准。我们还绘制了三个系列的窄避免交叉之间的精细结构弗洛凯水平相等和不同的，这是弱耦合的射频场通过拉曼过程。这种耦合导致了狭窄的避免交叉，也可以用作rf场校准的光谱标记。我们进一步发现，不同的相交Floquet电平的线强比提供了一个快速和稳健的射频场极化测量。
We investigate atom-based electric-field calibration and polarization measurement of a 100-MHz linearly polarized radio-frequency (rf) field using cesium Rydberg-atom electromagnetically induced transparency in a room-temperature vapor cell. The calibration method is based on matching experimental data with the results of a theoretical Floquet model. The utilizedfine-structure Floquet levels exhibit- and-dependent ac Stark shifts and splittings, and they develop even-order rf-modulation sidebands. The Floquet map of cesiumfine-structure states exhibits a series of exact crossings between states of different’s which are not rf coupled. These exact level crossings are employed to perform a rapid and precise () calibration of the rf electric field. We also map out three series of narrow avoided crossings between fine-structure Floquet levels of equal’s and different’s, which are weakly coupled by the rf field via a Raman process. The coupling leads to narrow avoided crossings that can also be applied as spectroscopic markers for rf-field calibration. We further find that the line-strength ratio of intersecting Floquet levels with different’s provides a fast and robust measurement of the rf field’s polarization.