基于室温里德堡原子天线的宽频带电场测量  

Broadband Electric-field Measurement Based on Room Temperature Rydberg Atomic Antenna

作　　者：杜艺杰 丛楠 何军[2,3] 杨仁福 DU Yi-jie;CONG Nan;HE Jun;YANG Ren-fu(Beijing Academy of Quantum Information Sciences,Beijing 100193;State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006)

机构地区：[1]北京量子信息科学研究院,北京100193 [2]山西大学光电研究所量子光学与光量子器件国家重点实验室,太原030006 [3]山西大学省部共建极端光学协同创新中心,太原030006

出　　处：《导航与控制》2022年第5期192-198,共7页Navigation and Control

基　　金：国家自然科学基金(编号:61875111)。

摘　　要：利用室温铯原子里德堡态构建原子天线,研究原子天线对30MHz~40GHz频率范围电磁波信号的响应特性。实验中,通过852nm和509nm的双光子激发方案实现里德堡原子的量子态制备,通过阶梯型电磁感应透明光谱实现电磁波信号测量。实验研究了66S_(1/2)、66D_(5/2)、76D_(3/2)里德堡态的宽频电磁波响应特性,研究发现近共振条件下,原子与电磁场通过电偶极共振跃迁耦合,光谱信号较强,系统的测量灵敏度为-110dBm/Hz±2dBm/Hz,线性动态范围为40dB;失谐条件下,原子与电磁场的相互作用主要是AC Stark频移,光谱信号较弱。对于铯原子,66S_(1/2)与66D_(5/2)里德堡态在30GHz附近存在测量不敏感区;76D_(3/2)量子态在30MHz~40GHz范围的偶极共振跃迁分布均匀,实验没有测量到明显的不敏感区。The atomic antenna is constructed using the room temperature Cesium Rydberg atom.The response characteristics of the atomic antenna to radio frequency(RF)signals in 30MHz~40GHz are explored.In the experiment,the Rydberg atom is prepared by 852nm and 509nm two-photon excitation scheme.The electromagnetic induced transparent(EIT)spectroscopy is employed to sense the RF wave.The broadband RF wave response characteristics of 66S_(1/2),66D_(5/2) and 76D_(3/2) Rydberg states are investigated.It is found that the measurement signal in the region of near dipole resonant RF field is strong,but weak in the far from resonant region,where the measurement is mainly realized by AC Stark shift.The system achieves a sensitivity up to-110dBm/Hz±2dBm/Hz,and the linear dynamic is 40dB.Among them,66S_(1/2) and 66D_(5/2) Rydberg states have a detection insensitive area at 30GHz.The dipole resonance transition of 76D_(3/2) quantum state is evenly distributed in the range of 30MHz~40GHz,and no obvious insensitive area in the experiment.

关 键 词：里德堡原子 连续频率测量 电磁感应透明 STARK位移 

分 类 号：O562.4[理学—原子与分子物理]