Simultaneous electromagnetically induced transparency and absorption in thermal atomic medium  

作　　者：Shangqing Liang Yunfei Xu Qiang Lin 梁尚清;徐云飞;林强(Institute of Optics, Department of Physics, Zhejiang University;Center for Optics & Optoelectronics Research, College of Science, Zhejiang University of Technology)

机构地区：[1]Institute of Optics, Department of Physics, Zhejiang University, Hangzhou 310027, China [2]Center for Optics ＆ Optoelectronics Research, College of Science, Zhejiang University of Technology, Hangzhou 310023, China

出　　处：《Chinese Optics Letters》2017年第9期41-45,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61475139);the National Basic Research Program of China(No.2013CB329501);the National High Technology Research and Development Program of China(No.2013AA063901);the Fundamental Research Funds for the Central Universities(No.2017FZA3005)

摘　　要：A three-level lambda system driven by multicolor control, pump, and probe fields is investigated. The pump and probe fields are derived from the same laser with opposite propagating directions. Due to the Doppler effect, the zero group-velocity atoms face bichromatic fields, while other atoms face trichromatic fields. The atomic medium shows distinct characteristics and exhibits simultaneous electromagnetically induced transparency（EIT） and electromagnetically induced absorption（EIA） at two frequencies. EIT and EIA peaks have a fixed relationship with frequency, which is determined by the Doppler shifts.A three-level lambda system driven by multicolor control, pump, and probe fields is investigated. The pump and probe fields are derived from the same laser with opposite propagating directions. Due to the Doppler effect, the zero group-velocity atoms face bichromatic fields, while other atoms face trichromatic fields. The atomic medium shows distinct characteristics and exhibits simultaneous electromagnetically induced transparency（EIT） and electromagnetically induced absorption（EIA） at two frequencies. EIT and EIA peaks have a fixed relationship with frequency, which is determined by the Doppler shifts.

关 键 词：EIT EIA Simultaneous electromagnetically induced transparency and absorption in thermal atomic medium 

分 类 号：O441[理学—电磁学]