Spatiotemporal Shaping of Ultrafast Laser-induced

il y a 5 jours


Marseille, France LP3 Laboratoire UMR 7341 Temps plein

**Spatiotemporal shaping of ultrafast laser-induced shockwaves for material phase transformations**:

- Réf **ABG-120150**
- Sujet de Thèse- 08/02/2024- Financement public/privé- LP3 Laboratoire UMR 7341- Lieu de travail- Marseille - Provence-Alpes-Côte d'Azur - France- Intitulé du sujet- Spatiotemporal shaping of ultrafast laser-induced shockwaves for material phase transformations- Champs scientifiques- Sciences de l’ingénieur
- Physique
- Mots clés- ultrafast physics, ultrashort laser pulse, laser beam shaping, shockwave**Description du sujet**:
The object of this thesis is to use laser-driven shockwaves to modify fused silica glass. A spatial light modulator will be used to transform a Gaussian beam into a Bessel-Vortex beam with variable ring thickness and diameter. A simultaneous temporal control of the laser pulse delivery will allow optimal conditions to be met for undamped shockwaves to propagate into the solid and selectively modify matter into new phases. These new phases should allow among others increased refractive index engineering paving the way towards monolithic fabrication of photonic devices. The structures will be characterized by state-of-the-art techniques including transmission electron microscopy and X-ray diffraction in collaboration with academic collaborators in Australia and Japan. The recruited student will use an existing setup at LP3 as a starting block that is used for the generation and characterization of Bessel beams [2]. This setup uses the ASUR laser facility at LP3 delivering infrared (λ=800 nm) pulses with 30 fs pulse duration and a pulse energy of 15 mJ.

This project is an excellent opportunity to develop skills in a multidisciplinary field of Physics (Plasma Physics, Lasers, Thermodynamics, Mechanics etc.) and engineering. The student should have a strong background in Optics and/or Materials Science. A taste for experimental physics is necessary. Funding has already been acquired from the National Research Agency.

[1] O. Koritsoglou, D. Loison, O. Uteza, and A. Mouskeftaras, “Characteristics of femtosecond laser-induced shockwaves in air,” _Opt. Express_, vol. 30, no. 21, p. 37407, 2022.

[2] X. Liu, R. Clady, D. Grojo, O. Utéza, and N. Sanner, “Engraving Depth‐Controlled Nanohole Arrays on Fused Silica by Direct Short‐Pulse Laser Ablation,” _Adv. Mater. Interfaces_, vol. 2202189, p. 2202189, 2023.

**Prise de fonction**:

- 01/10/2024**Nature du financement**:

- Financement public/privé**Précisions sur le financement**:

- financement acquis par l'ANR**Présentation établissement et labo d'accueil**:

- LP3 Laboratoire UMR 7341Le laboratoire LP3, créé en 2000, est une unité mixte de recherche (UMR 7341) dépendant du CNRS - Institut INSIS et de l’Université d’Aix-Marseille, située sur le pôle scientifique et technologique de Luminy à Marseille.

**Site web**:
**Intitulé du doctorat**:

- Doctorat de Physique**Pays d'obtention du doctorat**:

- France**Etablissement délivrant le doctorat**:

- Aix-Marseille Université**Ecole doctorale**:

- Physique et sciences de la matièreThe student should have a strong background in Optics and/or Materials Science. A taste for experimental physics is necessary.- 01/10/2024



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