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.
出处
《纺织高校基础科学学报》
CAS
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)
关键词
电磁感应透明
自发产生相干
KERR非线性
electromagnetically induced transparency
spontaneously generated coherence（SGC）
Kerr nonlinearity
