Effect of Time-Dependent Ionization on Propagation of a Few-Cycle Circularly Polarized Laser Pulse in Two-Level Medium  

作　　者：张向韵 孙真荣 陈果良 王祖赓 

机构地区：[1]State Key Laboratory of Precision Spectroscopy, and Department of Physics, and Department of Mathematics, East China Normal University, Shanghai 200062

出　　处：《Chinese Physics Letters》2008年第1期112-115,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10574046, the National Basic Research Programme of China under Grant Nos 2006CB806006 and 2006CB921105, the Programme for Changjiang Scholars and Innovative Research Team in University （PCSIRT）, the Programme for New Century Excellent Talents in University （NCET-04-0420）, the Doctoral Programme of High Education （No 20050269011）, and the Phosphor Programme Sponsored by Shanghai Science and Technology Committee （No 06QH14003）.

摘　　要：Influence of multiphoton ionization on the propagation and spectrum of few-cycle circularly （elliptically） polarized laser pulses in an open two-level medium （two-level plus continuum model） is investigated based on the conventional two-level model proposed by Slavcheva and Hess （Phys. Rev. A 72 （2005） 053804）, and the propagation dynamics of an arbitrary elliptically polarized laser pulse is reduced into that of right and left circularly polarized laser pulses. When the laser intensity is high enough to cause ionization, there are significant impacts of ionization on the pulse reshaping and on the higher order spectral components, and the impacts for the open two-level model are different from those for the dosed two-level model.Influence of multiphoton ionization on the propagation and spectrum of few-cycle circularly （elliptically） polarized laser pulses in an open two-level medium （two-level plus continuum model） is investigated based on the conventional two-level model proposed by Slavcheva and Hess （Phys. Rev. A 72 （2005） 053804）, and the propagation dynamics of an arbitrary elliptically polarized laser pulse is reduced into that of right and left circularly polarized laser pulses. When the laser intensity is high enough to cause ionization, there are significant impacts of ionization on the pulse reshaping and on the higher order spectral components, and the impacts for the open two-level model are different from those for the dosed two-level model.

关 键 词：PULSARS x-ray spectra relativity and gravitation REDSHIFT 

分 类 号：O43[机械工程—光学工程]