Description du sujet de thèse

Microwave optomechanics, which studies interactions between micro/Nano- electromechanical systems (MEMS/NEMS) and microwave photons, offers an interesting platform to manipulate and to detect nano-scale mechanical displacements. They have exhibited potential in serving for signal processing and sensing in the quantum region. The target of the project is to develop novel NEMS/MEMS hybrid microwave quantum circuits that allow to have strong coupling between NEMS arrays and the microwave cavity and to manipulate mechanical motions by both radio frequency signals and microwave photons at the same time. This project is based on our recent achievements in both silicon nitride (SiN) membrane nanoelectromechanical resonators and electrical circuit modeling of microwave optomechanics.

This work will allow IEMN and the other consortium partners to develop several NEMS coupled schemes (mechanical or capacitive coupling), to understand complexity of nonlinear dynamics in coupled oscillators, and to explore various computing methods by addressing bit information on each NEMS cell in a coupled network. The achievement of this project will bring a new unconventional scheme to next generation hardware for AI.
Activities
This research area is highly interdisciplinary. The Ph.D work will involve (i) experimental characterization of various coupled silicon nitride nanoelectromechanical oscillators, (ii) development of multi-physics models (comsol numerical simulation and analytical calculation), (iii) data analysis by programming, e.g. python (iv) clean-room device fabrication, and (vi) writing reports and communicating with collaborators.
Skills
You have or are about to obtain a master degree in at least one of the following areas: electronics OR physics OR mechanics OR signal processing. Basic knowledge of high frequency electronics. Mandatory experience in programming (e.g. python, matlab or C). Experience in clean-room, device fabrication process is a plus, but not mandatory. You are eager to learn and able to work in a team. Excellent written and verbal communication skills in English. Fluency in French is also a plus, but not mandatory.

Contexte de travail

The Institute of Electronic, Microelectronic and Nanotechnology (UMR CNRS 8520 – https://www.iemn.fr/en/) is in Villeneuve D'Ascq, close to the city of Lille (France). With a total staff of over 500 persons, the institute has a broad area of research activity ranging from physics to materials science, acoustics, micro- and nanotechnology. It offers high level clean-room for device fabrication and device characterization platform. The candidate is expected to work autonomously as well as in collaboration with a research team. For more details, please feel free to contact with the PI by email: xin.zhou@cnrs.fr or xin.zhou@iemn.fr

Contraintes et risques

Clean Room working: Training on site
Chemical Risks: Training on site
Nano Risks: Training on site