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High-order harmonic generation triggered by elliptically polarized laser pulses

Project description

Controlling attosecond pulse shapes via elliptical polarisation

High-order harmonic generation (HHG) occurs when a laser pulse interacts with a medium, producing attosecond light pulses that are vital for studying ultrafast phenomena. While intensity and frequency adjustments can alter pulse shapes, they are not easily modified in experiments. Instead, ellipticity serves as a simple control, though HHG remains limited to a narrow range of ellipticities. With support from the Marie Skłodowska-Curie Actions programme, the EPHHG project will develop theoretical models and advanced numerical methods to simulate and understand the self-consistent interactions between light and matter during light propagation. The project aims to enable continuous control of the shape of attosecond light pulses generated by incident elliptically polarised light across the entire range of laser ellipticities.

Objective

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.

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

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(opens in new window) HORIZON-MSCA-2023-PF-01

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Coordinator

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 195 914,88
Total cost

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