Effects of spontaneously generated coherence on transient process in a Λ system -: art. no. 063812

被引：81
|
作者：
Xu, WH [1 ]
Wu, JH
Gao, JY
机构：
[1] Jilin Univ, Coll Phys, Changchun 130023, Peoples R China
[2] Educ Minist China, Key Lab Coherent Light Atom & Mol Spect, Beijing, Peoples R China
[3] CCAST, World Lab, Beijing 100080, Peoples R China
来源：
PHYSICAL REVIEW A | 2002年 / 66卷 / 06期
关键词：
D O I：
10.1103/PhysRevA.66.063812
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Due to interaction with the vacuum of the radiation field, near-degenerate lower levels in a Lambda system have an additional coherence term, them spontaneously generated coherence term. In this paper, we investigate the effects of this kind of coherence on the transient process in the presence of a weak probe and a strong coherent field with or without an incoherent pump. We find that the transient gain. (absorption) properties can be dramatically affected by the spontaneously generated coherence. The transient gain can be greatly enhanced due to the effect of spontaneously generated coherence, and the transient absorption can be completely eliminated just by choosing the proper relative phase between the two fields.
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页数：6
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