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

被引：15
|
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
来源：
OPTICS COMMUNICATIONS | 2011年 / 284卷 / 24期
基金：
中国国家自然科学基金;
关键词：
Doppler effect; Two-photon constructive and destructive interference; Hot atomic system; ELECTROMAGNETICALLY INDUCED TRANSPARENCY; LIGHT-PROPAGATION; RUBIDIUM ATOMS; MEDIA; SLOW;
D O I：
10.1016/j.optcom.2011.08.038
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
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.
引用
收藏
页码：5697 / 5701
页数：5
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