Compensation of high order harmonic long quantum-path attosecond chirp

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 i...

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Bibliographic Details
Published in:Journal of optics (2010) 2017-12, Vol.19 (12), p.124011
Main Authors: Guichard, R, Caillat, J, Lévêque, C, Risoud, F, Maquet, A, Taïeb, R, Zaïr, A
Format: Article
Language:English
Subjects:
Atomic Physics
attosecond pulses
Chemical Physics
Chemical Sciences
Optics
or physical chemistry
Physics
strong field physics
Theoretical and
ultrafast optics
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Summary: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 Schrödinger 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.
ISSN:2040-8978
2040-8986
DOI:10.1088/2040-8986/aa9250