Observation of linewidth narrowing due to a spontaneously generated coherence effect  

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 

机构地区：[1]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 [2]College of Physics,Northeast Normal University [3]Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences [4]State Key Laboratory of Transient Optics and Photonics,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2012年第6期216-222,共7页中国物理B（英文版）

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)

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 SSRb atom and experimentally observe the narrowing of the central peak in a rubidium atomic beam. The corresponding spectrum can convindngiy demonstrate the existence of spontaneously generated coherence.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 SSRb atom and experimentally observe the narrowing of the central peak in a rubidium atomic beam. The corresponding spectrum can convindngiy demonstrate the existence of spontaneously generated coherence.

关 键 词：spontaneously generated coherence resonance fluorescence linewidth narrowing atomicbeam 

分 类 号：O431.2[机械工程—光学工程] O562[理学—光学]