基于Kerr非线性实现电磁感应光栅  

Electromagnetically Induced Grating based on the Kerr Nonlinearity

作　　者：巴诺[1] 王磊[2] 吴向尧[1] 李东飞[1] 王丹[1] 严立云[1] 

机构地区：[1]吉林师范大学物理学院,吉林四平136000 [2]吉林大学物理学院,吉林长春130012

出　　处：《吉林师范大学学报（自然科学版）》2015年第4期96-100,共5页Journal of Jilin Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(11347137;11247201);吉林省教育厅"十二五"科学研究项目(吉教科合字[2015]第215号)

摘　　要：本文研究驻波场相干驱动具有自发辐射四能级原子系统,在该原子系统中利用巨Kerr非线性实现电磁感应光栅.当自发辐射效应存在时,Kerr非线性能够提高同时伴随零线性吸收.因此,在驻波场的相干作用下,当耦合场失谐为共振时,能够获得一个纯的吸收光栅即探测场零级衍射最强.然而,在驻波场作用下,当耦合场失谐是非共振时,能够实现一个纯的相位光栅即探测场能被衍射到一级和二级方向.We proposed a scheme for realizing electromagnetically induced grating via the giant Kerr nonlinearity in a coherently driven four-level system with spontaneously generated coherence. In the presence of spontaneously generated coherence,Kerr nonlinearity could be enhanced with vanishing linear absorption. Thus,with a standingwave coupling field,one could achieve a pure absorption grating,which led the probe field to gather the zero-order direction when the detuning of the coupling field was on resonance. Moreover,we could obtain a pure phase grating,which diffracted a weak probe light into the first-order direction and the second-order direction when the detuning of the coupling field was off resonance.

关 键 词：量子光学 电磁感应光栅 原子相干 

分 类 号：O431.2[机械工程—光学工程]