https://doi.org/10.1140/epjp/s13360-022-03062-2
Regular Article
Attosecond-XUV pulse generation using laser-based high-harmonic generation in argon gas
1
Department of Physics, Manav Rachna University, 121004, Faridabad, Haryana, India
2
CSIR-National Physical Laboratory, 110012, New Delhi, India
Received:
20
May
2022
Accepted:
11
July
2022
Published online:
24
July
2022
High harmonic cut-off in high harmonic generation (HHG) based photon source is limited which restricts its further applications. In this work, we study single laser and three optical lasers based HHG in argon gas and analyze the harmonic cut-off of HHG spectra and the generated photon pulse structure. It is observed that the high harmonic spectrum strongly depends on the laser parameters such as wavelength, pulse duration, laser intensities. An extreme-ultraviolet (XUV) photon pulse of 90 keV photon energy with 270 as FWHM photon pulse duration is demonstrated in single laser-based HHG. However, in three colour laser case, it is extended up to 273 eV with 131 as FWHM photon pulse duration. Effect of time delays in-between the lasers is also studied on HHG spectrum and on the generated photon pulse characteristics. Effect of carrier-envelope phase (CEP) of laser is also discussed on photon pulse characteristics. Generation of such XUV-attosecond photon pulse is extremely important for the study of ultrafast dynamics in atoms and molecules.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
