Compensation of high order harmonic long quantum-path attosecond chirp

TY - JOUR

T1 - Compensation of high order harmonic long quantum-path attosecond chirp

AU - Guichard, R.

AU - Caillat, J.

AU - Lévêque, C.

AU - Risoud, F.

AU - Maquet, A.

AU - Taïeb, R.

AU - Zaïr, A.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - 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.

AB - 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.

KW - attosecond pulses

KW - strong field physics

KW - ultrafast optics

UR - https://www.scopus.com/pages/publications/85039840119

U2 - 10.1088/2040-8986/aa9250

DO - 10.1088/2040-8986/aa9250

M3 - Article

AN - SCOPUS:85039840119

SN - 2040-8978

VL - 19

JO - Journal Of Optics

JF - Journal Of Optics

IS - 12

M1 - 124011

ER -