Using amplitude modulation of the microwave field to improve the sensitivity of Rydberg-atom based microwave electrometry
Xiubin Liu,
Fengdong Jia,
Huaiyu Zhang,
Jiong Mei,
Yonghong Yu,
Weichen Liang,
Jian Zhang,
Feng Xie,
Zhiping Zhong
Affiliations
Xiubin Liu
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Fengdong Jia
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Huaiyu Zhang
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Jiong Mei
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Yonghong Yu
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Weichen Liang
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Jian Zhang
Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 100084, China
Feng Xie
Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 100084, China
Zhiping Zhong
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
The microwave (MW) field can be measured by the Autler–Townes (AT) splitting of the electromagnetically induced transparency (EIT) spectrum in the Rydberg atomic system; however, the EIT-AT splitting method fails in weak MW fields. We used the amplitude modulation of the MW field to resolve the EIT-AT splitting in weak MW fields. The EIT-AT splitting interval can be directly obtained, and the minimum detectable MW strength is improved by six times compared with the traditional EIT-AT splitting method. The proposed method is more intuitive and convenient for measuring the strength of weak MW fields in practical applications.
