Efficient generation of isolated attosecond pulses with high beam-quality by two-color Bessel-Gauss beams

TL;DR

This paper demonstrates a numerical method for generating high-quality isolated attosecond pulses using two-color Bessel-Gauss beams, achieving efficient supercontinuum generation with excellent beam properties.

Contribution

It introduces a novel approach to produce bright, high-quality attosecond pulses with high efficiency through supercontinuum generation driven by two-color Bessel-Gauss beams.

Findings

Efficient supercontinuum in the plateau region after propagation.

Gaussian-like spatial profile of the attosecond pulse.

Far-field divergence angle of 0.1 degrees.

Abstract

The generation of isolated attosecond pulses with high efficiency and high beam quality is essential for attosec- ond spectroscopy. We numerically investigate the supercontinuum generation in a neutral rare-gas medium driven by a two-color Bessel-Gauss beam. The results show that an efficient smooth supercontinuum in the plateau is obtained after propagation, and the spatial profile of the generated attosecond pulse is Gaussian-like with the divergence angle of 0.1 degree in the far field. This bright source with high beam quality is beneficial for detecting and controlling the microscopic processes on attosecond time scale.