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Chin. Phys. B, 2020, Vol. 29(1): 013201    DOI: 10.1088/1674-1056/ab593b

Highly sensitive detection of Rydberg atoms with fluorescence loss spectrum in cold atoms

Xuerong Shi(师雪荣)1,2, Hao Zhang(张好)1,2, Mingyong Jing(景明勇)1,2, Linjie Zhang(张临杰)1,2, Liantuan Xiao(肖连团)1,2, Suotang Jia(贾锁堂)1,2
1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract  Fluorescence loss spectrum for detecting cold Rydberg atoms with high sensitivity has been obtained based on lock-in detection of fluorescence of 6P3/2 state when cooling lasers of the magneto-optical trap are modulated. The experiment results show that the signal to noise ratio has been improved by 32.64 dB when the modulation depth (converted to laser frequency) and frequency are optimized to 4 MHz and 6 kHz, respectively. This technique enables us to perform a highly sensitive non-destructive detection of Rydberg atoms.
Keywords:  fluorescence loss spectrum      Rydberg atoms      signal to noise ratio  
Received:  10 October 2019      Revised:  12 November 2019      Accepted manuscript online: 
PACS:  32.10.Ee (Magnetic bound states, magnetic trapping of Rydberg states)  
  32.30.Dx (Magnetic resonance spectra)  
  32.50.+d (Fluorescence, phosphorescence (including quenching))  
Fund: Project supported by the National Key Research and Development Program of China (Grant Nos. 2017YFA0304203 and 2016YFF0200104), the National Natural Science Foundation of China (Grant Nos. 61505099, 61827824, 91536110, and 61975104), and the Fund for Shanxi ‘1331 Project’ Key Subjects Construction, Bairen Project of Shanxi Province, China.
Corresponding Authors:  Hao Zhang     E-mail:

Cite this article: 

Xuerong Shi(师雪荣), Hao Zhang(张好), Mingyong Jing(景明勇), Linjie Zhang(张临杰), Liantuan Xiao(肖连团), Suotang Jia(贾锁堂) Highly sensitive detection of Rydberg atoms with fluorescence loss spectrum in cold atoms 2020 Chin. Phys. B 29 013201

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