%0 Journal Article
%T Electromagnetically induced negative refraction induced by microwave field driving hyperfine levels transition<br>微波驱动精细结构能级跃迁引起的电磁诱导负折射效应
%A Li Xiao-Li
%A Zhang Lian-Shui
%A Sun Jiang
%A Feng Xiao-Min
%A <br>李晓莉
%A 张连水
%A 孙江
%A 冯晓敏
%J 物理学报
%D 2012
%I 
%X Electromagnetically induced negative refraction induced by microwave field driving hyperfine level transition is studied by proposing a quasi-lambda type four-level system. Negative refraction characteristics are observed when hyperfine levels within ground state are driven by a microwave field which interacts with electric dipole moment or magnetic dipole moment at different hyperfine levels. In addition, two optical transitions between ground state and excited state are driven by two coupling fields respectively, and the frequency bandwidth of negative refraction is controlled by the detuning of two coupling fields. It is shown that frequency bandwidth of negative refraction is much narrower under off-resonant coupling field than under the resonant coupling field and there is a significant difference in behavior between positively detuned coupling field and negatively detuned coupling field.
%K negative refraction
%K microwave field
%K permeability
%K permittivity<br>负折射
%K 微波场
%K 磁导率
%K 介电常数
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=2C2DE33E892A88202A5D365CF0C8E6E2&yid=99E9153A83D4CB11&vid=1D0FA33DA02ABACD&iid=E158A972A605785F&sid=A032A2F418F2217C&eid=A032A2F418F2217C&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=14