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Observation of linewidth narrowing due to a spontaneously generated coherence effect |
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| Authors: | Tian Si-Cong Wang Chun-Liang Kang Zhi-Hui Yang Xiu-Bin Wan Ren-Gang Zhang Xiao-Jun Zhang Hang Jiang Yun Cui Hai-Ning Gao Jin-Yue |
| Institution: | (a) College of Physics, Jilin University, Changchun 130012, China and Key Laboratory of Coherent Light and Atomic and Molecular Spectroscopy of Ministry of Education, 3ilin University, Changchun 130012, China b) College of Physics, Northeast Normal University, Changchun 130023, China c) State Key Laboratory of Transient Optics and Photonics, Xi＇an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi＇an 710119, China d) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China) |
| Abstract: | We investigate the resonance fluorescence spectrum of an atomic three-level ladder system driven by two laser fields. We show that such a system emulates to a large degree a V-type atom with parallel dipole moments-the latter being a system that exhibits spontaneously generated coherence and can display ultrasharp spectral lines. We find a suitable energy scheme in a 85Rb atom and experimentally observe the narrowing of the central peak in a rubidium atomic beam. The corresponding spectrum can convincingly demonstrate the existence of spontaneously generated coherence. |
| Keywords: | spontaneously generated coherence resonance fluorescence linewidth narrowing atomic beam |
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