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Portail > Offres > Offre UMR8520-FRELEF-112 - Chercheur CDD spectroscopie Térahertz en phase gaz H/F/NB

Postdoc : gaz phase spectroscopy in the Terahertz range

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

Date Limite Candidature : mercredi 23 février 2022

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General information

Reference : UMR8520-FRELEF-112
Date of publication : Wednesday, January 12, 2022
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 14 March 2022
Proportion of work : Full time
Remuneration : between 2690.42€ & 3099.75€
Desired level of education : PhD
Experience required : Indifferent


In this project, the candidate will have to:
(i) implement the gas spectroscopy setups; (ii) perform the experiments on simple gases and evaluate the limitation of the setup, (iii) implement the resonant cavity in the setup, (iv) perform the experiments on gas mixtures and evaluate the performances of the new approach.


This position is mainly experimental but we need a good understanding of the physical underlying principles. besides we anticipate a lot of new results and the post doc will spend a non negligible amount of time writing papers.


We are looking for a spectroscopist holding a PhD in physics or a related field. Having one of the following skills
would greatly increase the chance of success of any application:
Optical/spectroscopy experiments
Gas phase molecular spectroscopy
Coding (python) or algorithmic / optimization

Work Context

Halogen (ie CH 3 X; OX and HX; XX being Cl, I or Br) gas are produced by numerous industries, oceans and several other bio systems. During the past decades, researchers demonstrated their major role in the atmosphere.
They act on pollutants and particles through reactional cycles and are involved in the radiative forcing. They are major players of the Earth's energy budget and global warming. Still, today no technique exists able to measure these species at realistic concentration in real time. In this multidisciplinary internship, we propose to implement an innovative physical concept shown on figure 1:
coupling of the molecular frequency comb of a halogen gas to the optical frequency comb of a Fabry-Perot cavity.
This coupling will enhance the light matter interaction and consequently enable to detect extremely small concentrations of gas. We will probe this system using TeraHertz time domain spectroscopy (TDS) and a dedicated algorithm developed in the team to the study of gas by TDS in Lille and electronic sources in Dunkirk.

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