文献类型：期刊文献

英文题名：Extremely narrowed and amplified gain spectrum induced by the Doppler effect

作者：Zhang, Li-Da[1,2,3];Jiang, Yun[1,2];Wan, Ren-Gang[1,2];Tian, Si-Cong[1,2];Zhang, Bing[1,2];Zhang, Xiao-Jun[1,2];Gao, Jin-Yue[1,2];Niu, Yue-Ping[3,4];Gong, Shang-Qing[4]

机构：[1]Jilin Univ, Coll Phys, Changchun 130023, Peoples R China;[2]Jilin Univ, Key Lab Coherent Light & Atom & Mol Spect, Minist Educ, Changchun 130023, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China;[4]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2011

卷号：44

期号：13

外文期刊名：JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS

收录：;EI(收录号：20112714115459);WOS:【SCI-EXPANDED(收录号:WOS:000291870800017)】；

基金：The authors acknowledge the support from the NSFC (grant nos 11074097, 10904048, 11004079, 10874194, 60978013) and the National Basic Research Program (grant no 2006CB921101). Y P Niu also acknowledges the support from Shanghai Rising Star Project (11Q1407400).

语种：英文

外文关键词：Atoms - Probes

摘要：The effect of Doppler broadening on the gain spectrum is theoretically investigated in a hot N-type active Raman gain atomic system. It is found that the gain peak in the spectrum can be extremely narrowed and amplified by two orders at room temperature as compared with that in the cold atomic system. This remarkable result originates from the shift of the dressed levels and the modification to the transition probability between dressed states when the Doppler effect is considered in the hot atomic system. The enhanced subluminal and superluminal pulse propagation for the probe field in the hot atomic system has also been obtained by numerical simulation; the probe pulse undergoes no absorption and little pulse distortion.