Stéphane Trebaol

PhD opportunity in photonics at the Foton Institute / Université de Rennes in Lannion, France, focused on visible to mid-infrared integrated light sources based on rare-earth-doped materials compatible with silicon photonics . The project sits in the Photonic Systems team and combines micro/nano-fabrication , optical simulations , waveguide design , and device characterization . Research topics include integrated optical sources, passive and active integrated devices, hybrid integration, and the development of compact light sources for applications such as integrated sensors , lab-on-a-chip devices , biochemical sensing , quantum technologies , and telecom-related photonic components. Technical work mentioned in the post includes waveguide patterning, photo/e-beam lithography, reactive ion etching and ICP etching, optical design/simulation of integrated waveguides, and characterization of passive and active waveguide properties. The materials context includes rare-earth-doped oxides and chalcogenides, with emphasis on extending emission from the visible toward the mid-infrared. Eligibility highlights: strong background in physics and photonics; interest in both simulation and experimental work; prior experience with cleanroom activities, integrated device characterization, or photonic device simulation is preferred; good autonomy and communication skills in English or French. Duration: 36 months. Start: September–November 2026. No stipend amount or tuition details are specified in the post. How to apply: send a PDF application containing a cover letter, CV, academic transcript, and at least two reference letters to the listed supervisors by email.