High-order harmonic generation triggered by elliptically polarized laser pulses

Informations projet

EPHHG

N° de convention de subvention: 101154681

DOI

10.3030/101154681

Projet clôturé le 7 Mai 2025

Date de signature de la CE 2 Mai 2024

Date de début 1 Juin 2024

Date de fin 31 Mai 2026

Financé au titre de

• Marie Skłodowska-Curie Actions (MSCA)

Coût total

Aucune donnée

Contribution de l’UE

€ 195 914,88

Coordonné par

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
France

Periodic Reporting for period 1 - EPHHG (High-order harmonic generation triggered by elliptically polarized laser pulses)

Période du rapport: 2024-06-01 au 2026-05-31

Résumé du contexte et des objectifs généraux du projet

High-order harmonic generation (HHG) is a highly nonlinear phenomenon arising from the propagation of a laser pulse throughout a medium. HHG is used to generate tabletop sources of attosecond light pulses, essential for probing ultrafast phenomena in matter at the natural scales of the electrons. The shape of the generated light pulses can be changed by changing the intensity or the frequency of the incident light. However, these parameters cannot be continuously changed in experiments, in contrast to the ellipticity which is moreover simple to adjust and acts as a control knob. While polarization of the incident light is very promising for controlling the shape of the generated attosecond light pulses, up to date, HHG is limited to a narrow range of ellipticities only. The project EPHHG aims to control continuously the shape of generated attosecond light pulses from incident elliptically polarized lights in the full range of laser ellipticities. I propose a theoretical and numerical investigation adapted for this purpose. It includes the development of both theoretical models and sophisticated numerical methods in order to simulate and understand the self-consistent light-matter interactions occurring during light propagation.

Travail effectué depuis le début du projet jusqu’à la fin de la période considérée dans le rapport et principaux résultats atteints jusqu’à présent

We have derived equations for the USFA (Unified Strong Field Approximation).
We have developped an optimized version of our code to solve the Time Dependant Schrödinger Equation for 2 degrees of freedom of any laser polarization.

Progrès au-delà de l’état des connaissances et impact potentiel prévu (y compris l’impact socio-économique et les conséquences sociétales plus larges du projet jusqu’à présent)

We did not havae time to exploit the equations and the code we have obtained during the period of the MCSA EPHHG project.