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Portal > Offres > Offre UMR8523-ELEROU-002 - Chercheur post-doctorant (H/F) : Développement de systèmes photoniques ultra-rapides pour la caractérisation de champ électrique dans le domaine THz

Post-doctoral researcher: development of ultra-fast photonic systems for the characterization of ele

This offer is available in the following languages:
Français - Anglais

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General information

Reference : UMR8523-ELEROU-002
Workplace : VILLENEUVE D ASCQ
Date of publication : Tuesday, December 03, 2019
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 January 2020
Proportion of work : Full time
Remuneration : Between 2 617 € and 3 729 € gross monthly salary according to experience
Desired level of education : PhD
Experience required : Indifferent

Missions

The postdoctoral researcher will be part of the “accelerator-based coherent sources” research group of the DYSCO team (Complex System Dynamics) with the PhLAM laboratory (Physique des Lasers Atomes et Molécules). He/She will work under the supervision of Eléonore ROUSSEL within the framework of the CNRS Momentum METEOR (Time Microscopy of Relativist Objects).

The research project concerns the development of novel recording systems based on photonic strategies (fiber optics, femtosecond fiber lasers, electro-optic sampling, photonic time-stretch, etc.) for characterizing ultra-fast evolving electric field such as terahertz pulses, in single-shot. The initial motivation is the characterization of accelerator-based sources of coherent radiation in the terahertz domain, at the FERMI Free-Electron Laser in Trieste (Italy). Depending on the project needs, measurements of powerful THz coherent synchrotron radiation at other facilities as Synchrotron SOLEIL (France), as well as measurements of relativistic electron bunch shapes in single-shot are also foreseen. Depending on the performances of the realized detectors, search for new applications to “table-top” experiments will also be part of the postdoctoral project.

Activities

The post-doctoral fellow will be in charge of:
(i) the study of the limitations of the various single-shot electro-optic detection system based either on home-made optical spectrum analyzers, or on the photonic time-stretch principle.
(ii) the performance optimization of the existing experimental setups.
(iii) the implementation of new reconstruction algorithms
(iv) more in-depth investigations of new detection strategies.

The candidate will have to design and realize such novel systems, inspired or not by concepts and ideas already under development in the lab. This research activity will be pushed as much as possible, and finding new ideas of application for these terahertz detection systems can be considered. Other collaborations, not only accelerator-based but also "table-top" applications, may be included.

Technically, the photonic systems would imply fiber optics, as well as some free-propagating optics (at THz and 1550 wavelength). We would like also the candidate to be able to develop original analysis softwares.

It is expected that the data obtained will ultimately make it possible the publication of scientific results in international peer-reviewed journals as well as communication and dissemination of results in international conferences.

Skills

The position is intended for candidate with strong interest for experimentation and data analysis. Candidates must hold a doctorate in Physics, Engineering or in a related discipline and proven research skills in optics and/or photonics evidenced by at least one publication as the first/joint first or second author relating to these fields. Other essential criteria for this post are a sound knowledge of programming language such as Python and demonstrable experience in designing optical systems. Knowledges in accelerator physics and/or in terahertz applications is a valuable benefit, non compulsory, for this post as well as a flexibility and adaptability to experimentation limited in space and time. Candidates must have a very positive attitude to working in a team. Finally, fluency in spoken and written English is a requirement.

Work Context

This work is in the framework of the CNRS Momentum METEOR project within the PhLAM laboratory. PhLAM (Physique des Lasers Atomes et Molécules) is a joint research unit under the dual supervision of the University of Lille and the “Centre National de la Recherche Scientifique” (CNRS). PhLAM presents research activities related to light-matter interaction. Activities are predominantly experimental, but with a very strong coupling with theory. The Complex Systems Dynamics (DYSCO) group of PhLAM is specialized in the complex dynamics of relativistic electron bunches in synchrotron facilities such as storage rings and free-electron lasers and are recognized as international experts in the observation of ultra-fast phenomena.
The candidate will have at his disposal an optical laboratory equipped with femtosecond fiber lasers (Ytterbium and Erbium) as well as a femtosecond titanium-sapphire laser at 800 nm. The project also receives financial support from the Contrat de Projets État-Région (CPER Photonics for Society P4S).

Constraints and risks

Short periods of travel within France and abroad should be expected

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