Amplification of Elliptically Polarized Sub-Femtosecond Pulses in IR-Field-Dressed Neon-Like Active Medium of a Plasma-Based X-ray Laser

TL;DR

This paper presents a method to amplify elliptically polarized sub-femtosecond XUV pulses in a plasma-based X-ray laser medium, maintaining or increasing their ellipticity during amplification, with a proposed experimental setup using neon-like Ti ions.

Contribution

It introduces a novel amplification technique for elliptically polarized XUV pulses in plasma-based X-ray lasers, enhancing pulse polarization control.

Findings

Amplification preserves or increases pulse ellipticity.

Proposed experimental setup with neon-like Ti ions.

Effective amplification of high-order harmonic pulses.

Abstract

We propose a method for amplifying a train of sub-femtosecond pulses of circularly or elliptically polarized extreme ultraviolet (XUV) radiation constituted by high-order harmonics of an infrared (IR) laser field, in a neon-like active medium of a plasma-based X-ray laser, additionally irradiated with a replica of a fundamental frequency IR field. It is shown that the ellipticity of the pulses can be maintained or increased during the amplification process. The experimental implementation is suggested in an active medium of an X-ray laser based on neon-like Ti^{12+} ions irradiated by an IR laser field with a wavelength of 3.9 microns.