电磁感应透明与Kerr非线性效应的增强  

The electromagnetically induced transparency and enhanced Kerr nonlinearity effect

作　　者：王利强[1] 

机构地区：[1]西安邮电学院理学院,陕西西安710061

出　　处：《纺织高校基础科学学报》2011年第2期287-291,共5页Basic Sciences Journal of Textile Universities

基　　金：陕西省教育厅专项基金资助项目(2010JK556)

摘　　要：从理论分析了N型四能级原子系统中自发产生相干及外加激光场的强度变化对电磁感应透明和Kerr非线性效应的影响.结果发现,自发产生相干的存在能够使得Kerr非线性显著增强,随着其增强,Kerr非线性的峰值逐渐增强且进入电磁感应透明窗口内.此外,在自发产生相干系数极大时与不存在时相比,Kerr非线性能够增强10倍.研究还发现,减小耦合场和控制场强度之间的比值也能够增强Kerr非线性.A theoretical investigation of the effect of spontaneously generated coherence and the applied laser field intensity on the electromagnetically induced transparency and Kerr nonlinearity is carried out.It is found,with spontaneously generated coherence present,the Kerr nonlinearity can be clearly enhanced is carried out,and the maximal Kerr nonlinearity does not only enter the electromagnetically induced transparency window as the spontaneously generated coherence intensitifies,but also gets enhanced about 10 times with large SGC coefficients than that with no SGC effect.In addition,the enhanced Kerr nonlinearity can also be obtained by decreasing the ratio of the coupling field intensity to the control field intensity.

关 键 词：电磁感应透明 自发产生相干 KERR非线性 

分 类 号：O437[机械工程—光学工程]