Study of a four-level system in vee plus ladder configuration

被引：21

作者：

Bharti, Vineet ^{[1
]}

Natarajan, Vasant ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

来源：

OPTICS COMMUNICATIONS | 2015年 / 356卷

关键词：

Electromagnetically induced absorption; Four-level system; Coherent control; ELECTROMAGNETICALLY INDUCED TRANSPARENCY;

D O I：

10.1016/j.optcom.2015.08.042

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present the results of a theoretical study of a four-level atomic system in vee + ladder configuration using a density matrix analysis. The absorption and dispersion profiles are derived for a weak probe field and for varying strengths of the two strong control fields. For specificity, we choose energy levels of Rb-87, and present results for both stationary atoms and moving atoms in room temperature vapor. An electromagnetically induced absorption (EIA) peak with negative dispersion is observed at zero probe de-tuning when the control fields have equal strengths, which switches to electromagnetically induced transparency (ET) with positive dispersion (due to splitting of the EIA peak) when the control fields are unequal. There is significant linewidth narrowing in thermal vapor. (C) 2015 Elsevier B.V. All rights reserved.

引用

收藏

页码：510 / 514

页数：5

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