Extension of Harmonic Cutoff and Generation of Isolated Sub-30 as Pulse in a Two-Color Chirped Laser Field  

作　　者：张刚台 白婷婷 张美光 

机构地区：[1]Department of Physics and Information Technology,Baoji University of Arts and Sciences [2]Department of Mathematics,Baoji University of Arts and Sciences

出　　处：《Communications in Theoretical Physics》2012年第10期557-564,共8页理论物理通讯（英文版）

基　　金：Supported by the Science Foundation of Baoji University of Arts and Sciences of China under Grant Nos. Zk10122,ZK11061,ZK11135,ZK11060,and ZK1032

摘　　要：We theoretically investigate high-order harmonic and isolated attosecond pulse generation in a two-color chirped laser field,which is synthesized by a 9 fs/800 nm fundamental chirped pulse and a 9 fs/1600 nm controlling chirped pulse.Our numerical results show that,by using this method,not only is the harmonic cutoff significantly extended to the 948th order harmonic,but also the bandwidth of the supercontinuum spectrum is effectively broadened to about 1342 eV.In addition,due to the introduction of the chirp,the long quantum path is suppressed and only the short one is selected,and then an isolated 28 as pulse with a bandwidth of 155 eV is obtained directly.

关 键 词：high-order harmonic attosecond pulse generation SUPERCONTINUUM two-color chirped field 

分 类 号：TN24[电子电信—物理电子学]