Agile spectral tuning of high order harmonics by inteference of two driving pulses

TL;DR

This paper demonstrates a tunable extreme ultraviolet light source using high harmonic generation with two delayed pulses, enabling fast, flexible spectral tuning over a significant energy range.

Contribution

It introduces a novel method of spectral tuning of high order harmonics through interference of two driving pulses, enhancing flexibility and scalability.

Findings

Achieved a 0.8 eV tuning range at the 19th harmonic (22.8 eV)

Enabled fast and flexible spectral tuning

Scalable approach towards higher photon energies

Abstract

In this work the experimental realization of a tunable high photon flux extreme ultraviolet light source is presented. This is enabled by high harmonic generation of two temporally delayed driving pulses, resulting in a tuning range of 0.8 eV at the 19th harmonic at 22.8 eV. The implemented approach allows for fast tuning of the spectrum, is highly flexible and is scalable towards full spectral coverage at higher photon energies.