%0 Journal Article
%T Theoretical study of nonlinear electromagnetically induced absorption in four-level atomic system<br>四能级原子系统中非线性电磁感应吸收的理论研究
%A Wang Li
%A Lu Cheng
%A <br>王丽
%A 卢成
%J 物理学报
%D 2011
%I 
%X In the n-type four-level atomic system, we have studied the nonlinear theory of electromagnetically induced absorption. The results show that the probe light Rabi frequency and the attenuation distribution coefficient A affect the nonlinear absorption and then the absorption of a medium. When the probe light intensity is weak, the absorption of the medium and the linear absorption are the same, showing the characteristics of electromagnetic induction absorption. When the probe light intensity is increased, the absorption of the medium and the linear absorption are no longer the same, and now the medium absorption curve will show hole burning phenomenon, and then it will show the gain phenomenon. At the same time, the nonlinear absorption is affected by the value of A. Even if the probe light is weak, the medium absorption will change the electromagnetic induction absorption into the gain phenomenon with the A value decreasing.
%K electromagnetically induced absorption
%K nonlinear absorption
%K gain phenomenon
%K n-type four-level atomic system<br>电磁感应吸收
%K 非线性吸收
%K 增益现象
%K n型四能级原子系统
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=5486B056D61E56CC23B706F30ECC98D7&yid=9377ED8094509821&vid=BFE7933E5EEA150D&iid=E158A972A605785F&sid=F9F74EC1AA08A7B9&eid=E089FDF3CDAE8561&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=25