Signature spectrale de particules de suies pour applications LIDAR // Soot particles spectral features for Lidar applications

See text in english
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Monitoring carbonaceous aerosols is crucial to mitigating emissions at their source and reducing environment and climate impacts. Dedicated tools are lacking when it comes to long-distance measurements, as local probes and sampling methods are not suitable for remote and in situ applications. LIDAR methods are promising as they can potentially trace the entire spectrum of the whole family of carbon-based aerosols, from black carbon to brown carbon. These are mostly emitted through incomplete combustion processes, both natural and anthropogenic.
Upon photonic excitation, aerosols exhibit several processes including elastic scattering, Raman scattering, fluorescence and incandescence. Incandescence involves a transient heating process thanks to multiphoton absorption followed by black-body radiations. Regarding Lidar applications, Raman and fluorescence spectral features appear most promising for differentiating the carbonaceous aerosols.
The PhD project aims to 1) explore the spectral characteristic of laboratory-generated aerosol analogues, 2) assess their temperature dependence and 3) apply these exploitation under controlled conditions using recently designed Scheimpflug Raman and Fluorescence lidars in Lund in Sweden.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Début de la thèse : 01/10/2025

Programme COFUND LIGHTinPARIS

Université Paris-Saclay GS Physique

572 Ondes et Matière

Please see the english version
The candidate must have a background in Physics, Optics and Lasers. He/she should have an interest in working with experimental physics in an international and interdisciplinary environment spanning laser spectroscopy, combustion physics and atmospheric science. Programming skills will be considered as an advantage. Proficiency in both spoken and written in English is required.