整形啁啾脉冲作用下的双光子跃迁几率增强效应  

Enhancement of the transition probabilities for the two-photon transition with shaped chirped-pulse

作　　者：张敏华[1] 阿布力米提.吾买尔 许康[1] 任立庆[1] 李永放[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2010年第6期30-35,共6页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省自然科学基金资助项目(2007A04);陕西师范大学优秀博士论文基金资助项目(X2009YB09)

摘　　要：基于二阶微扰理论,分析了整形啁啾脉冲作用于原子系统的双光子过程.研究了在远离共振和近共振两种情况下啁啾脉冲光场作用时双光子跃迁几率的演化规律.结果表明:远离共振时,利用整形光脉冲作用于原子系统,会使得某些频率对应处的跃迁几率消失,光可以无损耗通过介质;近共振时,选择最佳相位函数对脉冲整形,可获得最大的双光子跃迁几率.Based on the second-order perturbation theory,the two-photon processes in the atom system excited by a shaped chirped-pulse are analyzed.The evolution of the two-photon transition probability is studied under the two cases of non-resonance and resonance.It′s shown that the transition probabilities disappeared at some corresponding frequencies under the non-resonance case,and thus the laser pulse can get through the medium without loss. Meanwhile,the maximum two-photon transition probability is obtained by choosing the best shaping function under the resonance case.

关 键 词：双光子跃迁 跃迁几率 整形啁啾脉冲 

分 类 号：O431.2[机械工程—光学工程]