Control of molecular excitation during the plasma generation of a femtosecond laser pulse  

作　　者：王全军 张杨华 王贞浩 丁晶洁 刘作业 胡碧涛 

机构地区：[1]School of Nuclear Science and Technology,Lanzhou University

出　　处：《Chinese Optics Letters》2016年第11期1-4,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11504148 and 11135002);the Fundamental Research Funds for the Central Universities(Nos.lzujbky-2015-269 and lzujbky-2015-242)

摘　　要：From a classical dynamic simulation,we find the kinetic energy of the electrons generated during laser plasma generation depends on the laser polarization and intensity.The electron kinetic energy reaches its maximum with a fixed laser intensity for circularly polarized laser pulse.The fluorescence spectra at 380.4 nm from N2 and 391.3 nm from N2^＋ are measured;these are generated by both the direct excitation and electron collision excitation.The electron collision excitation is determined by the electron energy and reaches the maximal with a circularly polarized pulse.From a classical dynamic simulation,we find the kinetic energy of the electrons generated during laser plasma generation depends on the laser polarization and intensity.The electron kinetic energy reaches its maximum with a fixed laser intensity for circularly polarized laser pulse.The fluorescence spectra at 380.4 nm from N2 and 391.3 nm from N2^＋ are measured;these are generated by both the direct excitation and electron collision excitation.The electron collision excitation is determined by the electron energy and reaches the maximal with a circularly polarized pulse.

关 键 词：Effects of collisions Strong field laser physics Spectroscopy  laser induced breakdown 

分 类 号：O561[理学—原子与分子物理]