Compensation of high order harmonic long quantum-path attosecond chirp

R. Guichard*, J. Caillat, C. Lévêque, F. Risoud, A. Maquet, R. Taïeb, A. Zaïr

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Article number124011
JournalJournal Of Optics
Issue number12
Publication statusPublished - 1 Dec 2017


  • attosecond pulses
  • strong field physics
  • ultrafast optics


Dive into the research topics of 'Compensation of high order harmonic long quantum-path attosecond chirp'. Together they form a unique fingerprint.

Cite this