Plasma effect on the phase matching of high harmonic generation  

作　　者：芦慧 刘灿东 赵诗童 刘鹏 

机构地区：[1]Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2011年第1期75-78,共4页中国光学快报（英文版）

基　　金：supported by the Chinese Academy of Sciences,the Chinese Ministry of Science and Technology,the National Natural Science Foundation of China(Nos.10734080,10523003,60921004,and 60978012);the National "973" Program of China (No.2006CB806000);the Shanghai Commission of Science and Technology(Nos.06DZ22015 and 07pj14091)

摘　　要：By optimizing the phase matching condition of high harmonic generation （HHG） from a supersonic neon gas jet, the enhanced HHG in the region of 60-70 eV has been selected. Three-dimensional numerical calculation shows that plasma plays a significant role in the phase matching process of HHG in a supersonic gas jet with short medium length. Due to plasma formation, the harmonic emission decays as the laser intensity reaches over 3.5 ~ 1014 W/cm^2. The plasma induces the broadening and blue shift of the HHG spectra, which provides a method for fine-tuning the harmonic wavelength.By optimizing the phase matching condition of high harmonic generation （HHG） from a supersonic neon gas jet, the enhanced HHG in the region of 60-70 eV has been selected. Three-dimensional numerical calculation shows that plasma plays a significant role in the phase matching process of HHG in a supersonic gas jet with short medium length. Due to plasma formation, the harmonic emission decays as the laser intensity reaches over 3.5 ~ 1014 W/cm^2. The plasma induces the broadening and blue shift of the HHG spectra, which provides a method for fine-tuning the harmonic wavelength.

关 键 词：Harmonic analysis NEON Phase matching PLASMAS Supersonic aerodynamics 

分 类 号：O534[理学—等离子体物理]