Description du sujet de thèse

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Optomechanics deals with the measurement and control of micro- and nanomechanical resonators using electromagnetic fields. Nanoscale systems significantly improve radiation-pressure coupling. Ultra-coherent mechanical oscillation can be achieved using blue-shifted resonant light. The archetypal structure is the optomechanical crystal, where the electromagnetic and displacement fields are simultaneously confined in a small volume, enabling a mechanical mode directly in the GHz frequency range and high optomechanical coupling, ensuring significant optomechanical interaction.
An optomechanical crystal heterogeneously integrated on a photonic circuit and the concept of spiking neurons will be central to the demonstration of innovative optomechanics-based neurons, whose performance and potential cascadability will be evaluated for future computations. The main objective is to demonstrate a first proof of principle of an integrated excitable optomechanical oscillator by implementing on-chip electrical actuation of such an oscillator. Once this is achieved, we will address the physics of excitability (pulses) to demonstrate the neuromorphic behavior of such a device.

Activities
- Numerical simulations and optimization of mechanical and optical resonators
- Design and fabrication of electro-optomechanical devices
- Development of experimental setups for the optical characterization of electro-optomechanical resonators
- Conducting electro-optical excitability and optical synchronization experiments

Required Skills
- Good level of optics in general
- Knowledge of nanophotonics and the design of photonic or phononic crystals
- Motivation for numerical simulation of optomechanical structures
- Ability to work in a team and interact with team members
- Experience in setting up integrated photonics and microwave experiments.
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Contexte de travail

The doctoral program will be completed within the Toniq group at the Center for Nanosciences and Nanotechnologies (C2N), a joint unit of the CNRS, Paris-Saclay University, and Paris Cité University. C2N brings together more than 120 researchers and 80 engineers, technicians, and administrative staff. It boasts a technology center with clean rooms spanning over 2,900 square meters. The GOSS group is composed of three researchers and includes more than 10 doctoral and postdoctoral students.

The position is located in a sector covered by the Protection of Scientific and Technical Potential (PPST) and, in accordance with regulations, requires your arrival to be authorized by the competent MESR authority.

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.

Contraintes et risques

None