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Observation of linewidth narrowing due to a spontaneously generated coherence effect

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【作者】 田思聪王春亮康智慧杨秀彬万仁刚张晓军张航姜云崔海宁高锦岳

【Author】 Tian Si-Cong a),Wang Chun-Liang b),Kang Zhi-Hui a),Yang Xiu-Bin d),Wan Ren-Gang c),Zhang Xiao-Jun a),Zhang Hang d),Jiang Yun a),Cui Hai-Ning a),and Gao Jin-Yue a) a)College of Physics,Jilin University,Changchun 130012,China and Key Laboratory of Coherent Light and Atomic and Molecular Spectroscopy of Ministry of Education,Jilin 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

【机构】 College of Physics,Jilin University,Changchun 130012,China and Key Laboratory of Coherent Light and Atomic and Molecular Spectroscopy of Ministry of Education,Jilin UniversityCollege of Physics,Northeast Normal UniversityChangchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of SciencesState Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences

【摘要】 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.

【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.

【基金】 Project supported by the National Basic Research Program of China (Grant No. 2011CB921603);the National Natural Science Foundation of China (Grant Nos. 11074097,10904048,10974071,and 11004080)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2012年06期
  • 【分类号】O431.2;O562
  • 【下载频次】32
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