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Modeling of Photonic-Hydrodynamic Coupling for Ultrafast Laser Nanostructuring

ABG-128408 Thesis topic
2025-02-07 Public funding alone (i.e. government, region, European, international organization research grant)
Laboratoire Hubert Curien
Saint-Etienne - Auvergne-Rhône-Alpes - France
Modeling of Photonic-Hydrodynamic Coupling for Ultrafast Laser Nanostructuring
  • Physics
  • Computer science
  • Engineering sciences
Simulation, Photonics, Artificial Intelligence, Theory, Hydrodynamics

Topic description

Femtosecond laser structuring enables the fabrication of functional nanostructured surfaces with applications in optics, energy, and biomedicine. Achieving precise nanoscale patterning requires understanding the complex interplay between hydrodynamic and photonic phenomena induced by ultrashort laser pulses.

This thesis focuses on:

Hydrodynamic modeling: Developing numerical methods to solve stochastic 3D Navier-Stokes equations, incorporating laser energy deposition with high-performance GPU computing in Julia.

Machine learning for multi-scale simulations: Designing neural networks combining experimental data and physical constraints to model nanoscale fluid dynamics.

Self-organization dynamics: Investigating convective instabilities leading to periodic nanostructures.

Chiral structure control: Integrating optical torque effects (spin and orbital angular momentum) to predict and generate asymmetric nanostructures.

This research aims to push the boundaries of current laser nanostructuring technologies through innovative numerical and AI-driven approaches.

Starting date

2025-10-01

Funding category

Public funding alone (i.e. government, region, European, international organization research grant)

Funding further details

A 3-year fellowship is available in Laboratory Hubert Curien at University Jean Monnet of Saint-Etienne, (member of Lyon University) France.

Presentation of host institution and host laboratory

Laboratoire Hubert Curien

The Hubert Curien laboratory is a joint research unit (UMR 5516) of the Jean Monnet University, Saint-Etienne,  the  National  Research  Center  ”CNRS”  and  the  Institut  d’Optique  Graduate  School. It is composed of about 240 staff which makes the lab the most important research structure of Saint- Etienne. The research activities are organized according to two scientific departments: Optics, photonics and surfaces and Computer Science, Security, Image. The research activity is structured into scientific projects within 6 main teams: Micro/Nano structuring, Materials for Optics and Photonics in Extreme Radiative Environments, Laser-matter Interaction,  Image Science & computer vision,  Data Intelligence and Secure Embedded Systems & Hardware Architectures.

PhD title

Doctorat en Optique, Photonique, Laser

Country where you obtained your PhD

France

Institution awarding doctoral degree

University of Saint-Etienne

Graduate school

Sciences, ingénierie, santé

Candidate's profile

The ideal candidate should have a strong interest in numerical computing and multi-physics modeling. A solid understanding of nonlinear physics is essential, along with the ability to work rigorously on fundamental aspects of complex systems. The candidate should also be autonomous and adaptable, capable of collaborating effectively with theoretical physicists, experimentalists, and computational scientists specializing in AI within the labHC team.

2025-05-30
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