https://doi.org/10.1140/epjqt/s40507-023-00184-z
Research
Microwave electrometry with bichromatic electromagnetically induced transparency in Rydberg atoms
1
Qingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, 266590, Qingdao, China
2
Beijing Institute of Radio Measurement, Beijing, China
3
Centre for Quantum Optical Technologies, Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097, Warsaw, Poland
b
Hehao@casic.com.cn
g
pengyd@sdust.edu.cn
Received:
29
March
2023
Accepted:
26
June
2023
Published online:
14
July
2023
A scheme for measuring microwave (MW) electric (E) fields is proposed based on bichromatic electromagnetically induced transparency (EIT) in Rydberg atoms. A bichromatic control field drives the excited state transition, whose absorption shows three EIT windows. When a MW field drives the Rydberg transition, the EIT windows split and six transmission peaks appear. It is interesting to find that the peak-to-peak distance of transmission spectrum is sensitive to the MW field strength, which can be used to measure MW E-field. Simulation results show that the spectral resolution could be increased by about 4 times, and the minimum detectable strength of the MW E-field may be improved by about 3 times compared with the common EIT scheme. After the Doppler averaging, the minimum detectable MW E-field strength is about 5 times larger than that without Doppler effect. Also, we investigate other effects on the sensitivity of the system.
Key words: Bichromatic electromagnetically induced transparency / Microwave electric field measurement / Rydberg atoms / Doppler effect
© The Author(s) 2023
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