电磁感应透明
里德堡原子
原子物理学
无线电频率
物理
Atom(片上系统)
平面波
里德伯公式
相(物质)
到达时间
到达角
外差探测
光学
激光器
电信
电离
量子力学
频道(广播)
离子
嵌入式系统
计算机科学
天线(收音机)
作者
Amy K. Robinson,Nikunjkumar Prajapati,Damir Senić,Matthew T. Simons,Joshua A. Gordon,Christopher L. Holloway
摘要
In this work, we demonstrate the use of a Rydberg atom-based sensor for determining the angle of arrival of an incident radio frequency (RF) wave or signal. The technique uses electromagnetically induced transparency in Rydberg atomic vapor in conjunction with a heterodyne Rydberg atom-based mixer. The Rydberg atom mixer measures the phase of the incident RF wave at two different locations inside an atomic vapor cell. The phase difference at these two locations is related to the direction of arrival of the incident RF wave. To demonstrate this approach, we measure phase differences of an incident 19.18 GHz wave at two locations inside a vapor cell filled with cesium atoms for various incident angles. Comparisons of these measurements with both the full-wave simulation and the plane wave theoretical model show that these atom-based sub-wavelength phase measurements can be used to determine the angle of arrival of an RF field.
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