Generation of subcycle isolated attosecond pulses by pumping ionizing gating
Abstract
We present a novel approach named as pumping ionizing gating (PIG) for the generation of isolated attosecond pulses (IAPs). In this regime, a short laser is used to ionize a pre-existing gas grating, creating a fast-extending plasma grating(FEPG) having an ionization front propagating with the velocity of light. A low-intensity long counterpropagating pump pulse is then reflected by a very narrow region of the ionization front, only where the Bragg conditions for resonant reflection is satisfied. Consequently, the pump reflection is confined within a sub-cycle region called PIG, and forms a wide-band coherent IAP in combination with the frequency up-conversion effect due to the plasma gradient. This approach results in a new scheme to generate IAPs fromlong picosecond pump pulses. Three-dimensional (3D) simulations show that a 1.6-ps, 1-{\mu}m pump pulse can be used to generate a 330 as laser pulse with a peak intensity approximately 33 times that of the pump and a conversion efficiency of around 0.1%.These results highlight the potential of the PIG method for generating IAPs with high conversion efficiency and peak intensity.
Keywords
Cite
@article{arxiv.2212.06599,
title = {Generation of subcycle isolated attosecond pulses by pumping ionizing gating},
author = {Zhaohui Wu and Hao Peng and Xiaoming Zeng and Zhaoli Li and 1 Zhimeng Zhang and 1 Huabao Cao and Yuxi Fu and Xiaodong Wang and Xiao Wang and Jie Mu and 1 Yanlei Zuo and C. Riconda and S. Weber and Jingqin Su},
journal= {arXiv preprint arXiv:2212.06599},
year = {2023}
}
Comments
It provides a new way to generate isolated attosecond pulse(IAP) by a picosecond pump, which has a protential to boost the IAP energy to joule level