Description du sujet de thèse

The objective of the PhD thesis is the study of modification processes of gap materials (dielectrics and silicon) by femtosecond lasers. A focus will be set on exploring the so-called GHz-burst mode.
In the case of dielectrics, the study will focus on understanding the interaction effects in this regime involving a comparison of the behavior of crystalline materials and glasses with a femtosecond laser operating at a wavelength of 1 μm. In the case of silicon, various coupled nonlinear effects induced by the laser pulse prevent the propagation of the pulse itself by creating a plasma and thus limit the deposition of energy at the desired focal point. The approach of this study is based on a two-photon interaction process in the GHz-burst regime. This new approach is exploratory and interdisciplinary, focusing mainly on emerging photonics and materials including the implementation of diagnostics for the characterization of intra-volume modifications. The study on silicon will be carried out in the frame of an international collaboration with the group of Prof. Stefan Nolte in Jena/Germany. The PhD will include joint experiments in Germany and in Bordeaux.

Requirements:
Studies: Master (or equivalent) in physics, photonics, material sciences, or engineering
Competences: Knowledge in optics, lasers, laser-matter interaction, gap materials (dielectrics and semiconductors), ultrafast optics materials characterization, microscopy, imaging
Personal qualities: scientific rigor, sense for initiative, team work, excellent relational qualities, highly motivated, fluent English

Contexte de travail

This thesis will be conducted at the CELIA UMR5105 laboratory in Talence (University of Bordeaux) in the Short-pulse Lasers: Applications and Materials (SLAM) team under the supervision of Inka Manek-Hönninger (Professor) and John Lopez (Research Engineer). The team is internationally recognized for its research using femtosecond lasers in the GHz burst regime.
The CELIA laboratory is a restricted access area. Access to the laboratory is subject to security clearance.

Le poste se situe dans un secteur relevant de la protection du potentiel scientifique et technique (PPST), et nécessite donc, conformément à la réglementation, que votre arrivée soit autorisée par l'autorité compétente du MESR.