High harmonic generation driven by twocolor relativistic circularly polarized laser pulses at various frequency ratios  

作　　者：Duan XIE Yan YIN Tongpu YU Hongyu ZHOU Ziyu CHEN Hongbin ZHUO 谢端;银燕;余同普;周泓宇;陈自宇;卓红斌(School of Electronic Information and Electrical Engineering,Changsha University,Changsha 410003,People’s Republic of China;Department of Physics,National University of Defense Technology,Changsha 410073,People’s Republic of China;College of Physics,Sichuan University,Chengdu 610064,People’s Republic of China;Center for Advanced Material Diagnostic Technology,Shenzhen Technology University,Shenzhen 518118,People’s Republic of China)

机构地区：[1]School of Electronic Information and Electrical Engineering,Changsha University,Changsha 410003,People’s Republic of China [2]Department of Physics,National University of Defense Technology,Changsha 410073,People’s Republic of China [3]College of Physics,Sichuan University,Chengdu 610064,People’s Republic of China [4]Center for Advanced Material Diagnostic Technology,Shenzhen Technology University,Shenzhen 518118,People’s Republic of China

出　　处：《Plasma Science and Technology》2021年第4期63-69,共7页等离子体科学和技术（英文版）

基　　金：supported by the National Key R&D Program of China(No.2018YFA0404802),Science Challenge Project(No.TZ2016005);National Natural Science Foundation of China(Nos.11774430,11875319);Research Project of NUDT(Nos.ZK18-02-02);Fok Ying-Tong Education Foundation(No.161007),the Fundamental Research Funds for the Central Universities(YJ202025);the Natural Science Foundation of Hunan Province(Nos.2020JJ5614 and 2020JJ5624);the Scientific Research Foundation of Hunan Provincial Education Department(No.20A042).

摘　　要：High harmonic generation(HHG)by two-color counter-rotating relativistic laser pulses with arbitrary frequency ratio is investigated through particle-in-cell simulations.It is shown that the dichromatic laser driver at various frequency ratios can effectively produce high-order harmonics with different spectral features.A general selection rule of this extended scheme can be obtained and the corresponding harmonic helicity can be identified through a simple analytical model based on a relativistic oscillating mirror.Thus,the results in this paper may offer new opportunities for arbitrary spectral control of generated harmonics,which is of significance for diverse potential applications in practice.

关 键 词：high-harmonic generation two-color laser pulses relativistic oscillating mirror 

分 类 号：O53[理学—等离子体物理] TN249[理学—物理]