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正交偏振双色激光场作用下生成的孤立阿秒脉冲
引用本文:张丽,杨玉芬,袁美玲,夏昌龙,刘学深.正交偏振双色激光场作用下生成的孤立阿秒脉冲[J].原子与分子物理学报,2010,27(2):275-278.
作者姓名:张丽  杨玉芬  袁美玲  夏昌龙  刘学深
作者单位:1. 空军航空大学基础部,长春,130022
2. 吉林大学网络中心,长春,130012
3. 吉林大学原子与分子物理研究所,长春,130012
摘    要:我们理论研究了正交偏振双色激光场作用下的高次谐波发射和孤立阿秒脉冲的产生.当y方向加一束中红外激光脉冲(12.5 fs/2000 nm),x方向加一束强度较弱的激光脉冲(12 fs/800 nm)时,我们得到从250 eV到350 eV的超连续谐波平台,在平台范围内叠加50 eV的谐波,可以得到一个脉宽约为97as的孤立阿秒脉冲. 通过时频分析,我们解释了高次谐波发射的物理机制.

关 键 词:正交偏振双色激光场  高次谐波  阿秒脉冲

Single attosecond pulse generation in an orthogonally polarized two-color laser field
ZHANG Li,YANG Yu-Fen,YUAN Mei-Ling,XIA Chang-Long,LIU Xue-Shen.Single attosecond pulse generation in an orthogonally polarized two-color laser field[J].Journal of Atomic and Molecular Physics,2010,27(2):275-278.
Authors:ZHANG Li  YANG Yu-Fen  YUAN Mei-Ling  XIA Chang-Long  LIU Xue-Shen
Abstract:We theoretically investigate the high-order harmonic generation and single attosecond pulse generation in an orthogonally polarized two-color laser field, which is synthesized by a mid-IR pulse (12.5fs/2000nm) in -component and a much weaker (12fs/800nm) pulse in -component. We find that the supercontinuum harmonic plateau is formed from 250 eV to 350 eV and an isolated attosecond pulse with a duration of about 97 as can be obtained when superposing a region of 50eV. We investigate the emission time of the harmonics in terms of the time-frequency analysis to illustrate the physical mechanism of high-order harmonic generation.
Keywords:Orthogonally polarized two-color laser field  high-order harmonic generation  single attosecond pulse generation
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