基于铷里德堡原子的频率可调谐微波电场测量  

Frequency Tunable Microwave Electric Field Measurement Based on Rubidium Rydberg Atoms

作　　者：阮伟民 张映昀 冯志刚[2] 周亚东 宋振飞[2] 屈继峰[2] RUAN Weimin;ZHANG Yingyun;FENG Zhigang;ZHOU Yadong;SONG Zhenfei;QU Jifeng(China Jiliang University,Hangzhou,Zhejiang 310018,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]中国计量大学,浙江杭州310018 [2]中国计量科学研究院,北京100029

出　　处：《计量学报》2024年第1期97-102,共6页Acta Metrologica Sinica

基　　金：国家自然科学基金(62071443);国家重点研发计划(2021YFF0603704)。

摘　　要：基于里德堡原子的能级调控特性实现了微波电场连续调谐测量。用铷原子气室作为微波电场传感器同时去感知待测微波场和调谐微波场,利用强调谐场对里德堡原子能级精细调节实现了待测场共振频率的同步改变,从而拓展了现有单频点微波测量的频率响应范围。在与68P_(3/2)→66D_(5/2)跃迁共振的调谐场作用下,利用测量的AT分裂光谱的幅值差来确定待测场共振频点的调谐变化,最终使共振的6.916 GHz待测场的共振频率的调谐范围从原有的30 MHz极限拓宽至150 MHz,为微波电场的量子计量及拓展应用奠定技术基础。The continuous tuning measurement of microwave electric field is realized based on the energy level regulation of Rydberg atoms.A rubidium atomic gas chamber is used as a microwave electric field sensor to sense the signal field and the tuning field at the same time.The tuning field is used to fine-tune the Rydberg atomic energy level to realize the synchronous change of the resonant frequency of the signal field,thus expanding the frequency response range of the existing single-frequency microwave measurement.Under the effect of the tuning field that resonates with 68P_(3/2)→66D_(5/2) transition,the amplitude difference of the measured AT splitting spectrum is used to determine the tuning change of the resonance frequency point of the signal field.Finally,the tuning range of the signal field with the frequency of 6.916 GHz is widened from the original 30 MHz to 150 MHz.It lays a technical foundation for the quantum measurement and application of microwave electric field.

关 键 词：微波量子计量 里德堡原子 微波电场 量子相干 能级调谐 

分 类 号：TB973[一般工业技术—计量学]