Population transfer by femtosecond laser pulses in a ladder-type atomic system  

作　　者：樊锡君 李爱云 仝殿民 刘呈普 

机构地区：[1]College of Physics and Electronics,Shandong Normal University [2]School of Physics and Microelectronics,Shandong University [3]Institute of Advanced Energy,Kyoto University

出　　处：《Chinese Physics B》2008年第7期2522-2526,共5页中国物理B（英文版）

基　　金：supported by National Basic Research Program of China (Grant No 2006CB806003);the Natural Science Foundation of Shandong Province,China (Grant No Y2006A21);the National Natural Science Foundation of China (Grant No 10675076);State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,China

摘　　要：The population transfer in a ladder-type atomic system driven by linearly polarized sech-shape femtosecond laser pulses is investigated by numerically solving Schr6dinger equation without including the rotating wave approximation （RWA）. It is shown that population transfer is mainly determined by the Rabi frequency （strength） of the driving laser field and the chirp rate, and that the ratio of the dipole moments and the pulse width also have a prominent effect on the population transfer. By choosing appropriate values of the above parameters, complete population transfer can be realized.The population transfer in a ladder-type atomic system driven by linearly polarized sech-shape femtosecond laser pulses is investigated by numerically solving Schr6dinger equation without including the rotating wave approximation （RWA）. It is shown that population transfer is mainly determined by the Rabi frequency （strength） of the driving laser field and the chirp rate, and that the ratio of the dipole moments and the pulse width also have a prominent effect on the population transfer. By choosing appropriate values of the above parameters, complete population transfer can be realized.

关 键 词：population transfer femtosecond laser pulses ladder-type system 

分 类 号：O431.2[机械工程—光学工程] O562[理学—光学]