Broadband isolated attosecond pulse generation in a two-color laser field combined with an orthogonally polarized laser pulse

作     者：DU HongChuan WANG XiaoShan HU BiTao 

作者机构：School of Nuclear Science and Technology Lanzhou University Lanzhou 730000 China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2012年第55卷第1期

页      面：1-6页

核心收录：

学科分类：0710[理学-生物学] 070207[理学-光学] 07[理学] 071002[理学-动物学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 110775069, 91026021, 11075068 and 10875054) the Fundamental Research Funds for the Central Universities (Grant No.lzujbky-2010-k08) the Scholarship Award for Excellent Doctoral Student granted by Ministry of Education 

主　　题：HHG supercontinuum attosecond pulses 

摘      要：We present a method to generate broadband isolated attosecond pulses. Using a two-color laser field, which is synthesized by a mid-infrared （12.5 fs, 2000 nm） and a weaker （12 fs, 800 nm） pulse in the x direction, a modulated supercontinuum from 290 to 430 eV is obtainable. By properly adding a second-harmonic control field of the driving pulse in the y direction, the short quantum path is well selected and a smooth supercontinuum from 290 to 440 eV is generated. The bandwidth of the supercontinuum can be controlled by adjusting the electric field of the control pulse in the x direction. When the electric field increases to 0.051 a.u., a smooth supercontinuum from 295 to 520 eV is obtained. Using this method we expect that isolated 63-as attosecond pulses with tunable central wavelengths are straightforwardly *** present a method to generate broadband isolated attosecond pulses. Using a two-color laser field, which is synthesized by a mid-infrared （12.5 fs, 2000 nm） and a weaker （12 fs, 800 nm） pulse in the x direction, a modulated supercontinuum from 290 to 430 eV is obtainable. By properly adding a second-harmonic control field of the driving pulse in the y direction, the short quantum path is well selected and a smooth supercontinuum from 290 to 440 eV is generated. The bandwidth of the supercontinuum can be controlled by adjusting the electric field of the control pulse in the x direction. When the electric field increases to 0.051 a.u., a smooth supercontinuum from 295 to 520 eV is obtained. Using this method we expect that isolated 63-as attosecond pulses with tunable central wavelengths are straightforwardly obtained.