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Reference : UMR7162-NATMER0-012
Workplace : PARIS 13
Date of publication : Monday, June 7, 2021
Scientific Responsible name : Ivan FAVERO
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 October 2021
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
Experimental research on quantum optomechanics and fluids.
Can we use light to probe interactions between a mechanical system and a fluid at the quantum level ?
Within the family of quantum sensors, nanomechanical resonators have the specificity to enable detection of almost any kind of physical signal. Thanks to recent advances in optomechanics , their motion is measured optically with unprecedented sensitivity and speed (10^(-18) m/√Hz at GHz frequency demonstrated for example in our team [2,3]), opening new types of biophysics experiments .
In this PhD project, we will employ these assets of optomechanical detection to optically probe interactions between a nanomechanical resonator and a fluid. The ambition is to push the investigation down to the quantum level, meaning in a regime where the fluid displays a
quantum behavior, controlled by light, and second in a regime where the mechanical system operates itself as a quantum system.
To this purpose, we will employ a technology of nanooptomechanical resonators built in the family of III-V semiconductors, usually employed in optoelectronics. The integrated optomechanical devices resulting from this technology present several advantages: they can be immersed in different fluids, while enabling optomechanical operation in the quantum regime, and at the same time they host polariton light-matter quasi-particles, which can adopt controlled quantum fluid phases.
The PhD project, carried within the ERC NOMLI project , aims at finally simulating and understanding the evolution of a quantum system living in a fluid environment.
 I. Favero, and K. Karrai. Nature Photonics 3, 201 (2009).
 L. Ding, C. Baker, P. S., A. Lemaitre, S. Ducci, G. Leo and I. Favero. Phys. Rev. Lett. 105, 263903
 E. Gil-Santos, C. B, D. T. N., A. L., C. G, G. Leo, S. Ducci and I. Favero. Nature Nanotechnology 10, 810 (2015).
 E. Gil-Santos, et al. Nature Nanotechnology 15, 469 (2020).
The « Matériaux et Phénomènes Quantiques » (Quantum Materials and Phenomena) Institute is a joint research unit (UMR) of University of Paris and CNRS. It involves about 120 people in total, and is located in Paris city, close to the François Mitterand national librabry.
The doctoral student will be attached to the optomechanical part of the Nonlinear Optical Devices (DON) team. This team is made up of four researchers and teacher-researchers and a research engineer
Constraints and risks
No specific constraint or risk. Experimental activity involving the use of lasers and nanofabrication in a clean room.
Profil recherché : Physics master 2 Research level. Motivation, dedication to work, curiosity.
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