Compensation of high order harmonic long quantum-path attosecond chirp

被引:1
作者
Guichard, R. [1 ]
Caillat, J. [2 ]
Leveque, C. [2 ,3 ]
Risoud, F. [2 ]
Maquet, A. [2 ]
Taieb, R. [2 ]
Zair, A. [4 ]
机构
[1] UCL, Res Software Dev Grp, Res IT Serv, London WC1E 6BT, England
[2] Univ Paris 06, UPMC, Lab Chim Phys Mat & Rayonnement, CNRS,UMR 7614, F-75231 Paris 05, France
[3] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark
[4] Kings Coll London, Dept Phys, London WC2R 2LS, England
基金
英国工程与自然科学研究理事会;
关键词
attosecond pulses; strong field physics; ultrafast optics; LASER FIELDS; GENERATION; PULSES; IONIZATION; DYNAMICS; SPECTROSCOPY; MOLECULES;
D O I
10.1088/2040-8986/aa9250
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We propose a method to compensate for the extreme ultra violet (XUV) attosecond chirp associated with the long quantum-path in the high harmonic generation process. Our method employs an isolated attosecond pulse (IAP) issued from the short trajectory contribution in a primary target to assist the infrared driving field to produce high harmonics from the long trajectory in a secondary target. In our simulations based on the resolution of the time-dependent Schrodinger equation, the resulting high harmornics present a clear phase compensation of the long quantum-path contribution, near to Fourier transform limited attosecond XUV pulse. Employing time-frequency analysis of the high harmonic dipole, we found that the compensation is not a simple far-field photonic interference between the IAP and the long-path harmonic emission, but a coherent phase transfer from the weak IAP to the long quantum-path electronic wavepacket. Our approach opens the route to utilizing the long quantum-path for the production and applications of attosecond pulses.
引用
收藏
页数:7
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