文献类型：期刊文献

英文题名：The effect of Doppler broadening on dispersive and absorptive properties in atomic systems with two-photon interference

作者：Zhang, Lida[1];Zhou, Fengxue[2];Niu, Yueping[2];Zhang, Jingtao[1];Gong, Shangqing[2]

机构：[1]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China;[2]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2011

卷号：284

期号：24

起止页码：5697

外文期刊名：OPTICS COMMUNICATIONS

收录：;EI(收录号：20114114424007);WOS:【SCI-EXPANDED(收录号:WOS:000296687100031)】；

基金：This work was supported by the National Natural Science Foundation of China (Grants No. 60978013 and No. 10874194), and the Shanghai Commission of Science and Technology with Grant No.10530704800.

语种：英文

外文关键词：Doppler effect; Two-photon constructive and destructive interference; Hot atomic system

摘要：The effect of Doppler broadening on dispersive and absorptive properties is theoretically investigated in the hot four-level electromagnetically induced transparency (EIT) atomic systems with two different types of two-photon interference. It is found that the dispersive behavior for the probe in the ladder-type atomic system with two-photon constructive interference will be changed from anomalous in cold atoms to normal in hot atoms, and the three-peak absorptive profile is shifted to a broadened spectrum with a shallow dip at the line center; as a comparison, there is always normal dispersion at the line center for the invert-Y-type atomic system with two-photon destructive interference, but the EIT window in the absorptive profile will be narrowed to subnatural linewidth (0.01 Gamma) at room temperature. The physics of those two different behaviors are discussed and compared in the dressed-state theory. (C) 2011 Elsevier B.V. All rights reserved.