1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathmatics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; 2 National University of Defence Technology, Changsha 410073, China; 3 University of Chinese Academy of Sciences, Beijing 100049, China
Abstract We have presented a high resolution spectroscopy of Rb in magnetic field by far-detuning electromagnetically induced transparency (EIT). The EIT spectrum in the -type configuration is usually companied by a double resonance optical pumping (DROP) due to the strong optical coupling between the two upper states, leading to the spectral lines seriously deformed and widely broadened for complex relaxation processes in DROP. Here we demonstrate a high resolution spectroscopy by far-detuning EIT for in magnetic fields. The method of far-detuning eliminates the relaxation in DROP to the most extent and decreases the spectral linewidth from more than 20 MHz down to its natural linewidth limit (6 MHz). The deformation of the spectral lines also disappears and the observed spectra are well in accordance with the theoretical calculation. Our work shows that far-detuning EIT is a reliable high resolution spectroscopic method when the relaxation in DROP cannot be neglected, especially for the case of transition to low excited states.
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12074388 and 12004393).
Corresponding Authors:
Hong-Ping Liu
E-mail: liuhongping@wipm.ac.cn
Cite this article:
Zi-Shan Xu(徐子珊), Han-Mu Wang(王汉睦), Ming-Hao Cai(蔡明皓), Shu-Hang You(游书航), and Hong-Ping Liu(刘红平) High resolution spectroscopy of Rb in magnetic field by far-detuning electromagnetically induced transparency 2022 Chin. Phys. B 31 123201
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