Double-resonance optical-pumping effect and ladder-type electromagnetically induced transparency signal without Doppler background in cesium atomic vapour cell - Yang, Bao-Dong (保东 杨); Gao, Jing (静高); Liang, Qiang-Bing (强兵 梁); Wang, Jie (杰王); Zhang, Tian-Cai (天才 张); Wang, Jun-Min (军民 王) (Chinese physics B, 2011)