Spatio-spectral light modulator of XUV high harmonics

TL;DR

This paper presents a novel method for manipulating the spatio-spectral distribution of high-order harmonic generation in the XUV regime by guiding electron trajectories with a control field, enabling precise tailoring for advanced applications.

Contribution

The study introduces a new technique to control the spatio-spectral properties of high harmonics using a control field, enhancing the capabilities for ultrafast metrology and imaging.

Findings

Achieved precise spatio-spectral tailoring of high harmonics.

Demonstrated control over emission angle and spectral features.

Enabled potential applications in ultrafast XUV metrology and imaging.

Abstract

High-order harmonic generation (HHG), characterized by its highly nonlinear nature, often exhibits a complex spatio-temporal profile that poses challenges for practical applications. In this study, we unveil a method for manipulating the spatio-spectral distribution of HHG by guiding the recollision electron trajectory in the spatio-temporal domain using a control field. The resulting far-field high harmonic (HH) radiation inherits the intricate spatio-temporal characteristics of the control field, showcasing diverse features including spatial tilting, spectral shifting, and emission angle deflection. Using the relative delay between the control field and the driving pulse as the primary control parameter, we achieve precise tailoring of the high harmonics in the spatio-spectral domain. This controllability in HH benefits ultrafast metrology and imaging applications in the extreme ultraviolet (XUV) regime.