Molecular Physico-Chemistry and Instrumentation
The Molecular Physico-Chemistry and Instrumentation (PCMI) theme offers innovative analyzes, methodologies, technologies and formalisms for the study of the physico-chemistry of the atmosphere through, mainly, the understanding of molecular species of atmospheric interest. Part of his studies focuses on the production of functional molecular materials that can be used in environmental applications.
PCMI offers technological breakthroughs in terms of instrumentation, innovative modeling tools and a field of study in metrology, reactivity and environmental spectroscopy balanced between fundamental molecular physico-chemistry and applications.
PCMI researchers / experimenters are proposing new technological breakthroughs for spectroscopy and environmental metrology:
In the field of terahertz (THz) waves, they take advantage of the latest advances in optics, optoelectronics and electronics, as well as their expertise in the manipulation and exploitation of frequency combs, to propose new approaches that will surpass the capabilities of current THz spectrometers in terms of spectral coverage and frequency metrology. To boost the sensitivity of their instrumentation, they are working on the development of next-generation radio-acoustic detection based on microelectromechanical systems and adapting intra-cavity IR techniques to THz.
In the IR and UV fields, they are developing photonic instrumentation at the limits of know-how for optical metrology of stable and unstable molecules of atmospheric interest. Real progress has been made on measurements in terms of sensitivity and precision, spatial and temporal scales, as well as data acquisition and processing. PCMI is now adapting its instrumentation to field measurements. Today it involves: (i) Telemetry of vertical greenhouse gas concentration profiles using laser heterodyne radiometry; (ii) measurement of atmospheric OH radicals at ultra-low concentration levels by coupling Faraday rotational spectroscopy with the CRDS technique; (iii) high resolution remote sensing by combing greenhouse gas frequencies.
Finally, they use the photo-inscription technique in chalcogenide glasses to produce waveguides in the IR medium, with the aim of optimizing linear guides and studying more complex structures. These are the basic elements of optical circuitry such as curved guides, beam splitters / combiners, or even interferometers. Photo-inscription in chalcogenide fibers is now being considered to design more advanced instruments and integrate them into devices developed by PCMI for the detection of molecular species or aerosols.
THESIS IN PROGRESS
BRUCKHUISEN Jonas 2019-2022
"Sub-millimeter gas phase detection of oxygenated biogenic Volatile Organic Compounds (VOCs) precursors of secondary organic aerosols: from the laboratory to the atmosphere" [A. Cuisset (LPCA) - G. Dhont]
CUI Ruyue 2019-2022
"High-sensitivity laser absorption spectroscopy technology based on optical cavities for field applications" [W. Chen (LPCA)]
NGO Minh Nhut 2019-2022
"Development of instrumentation for the measurement of species of atmospheric interest by laser spectroscopy " [W. Chen (LPCA)]
ABICHOU Goufrane 2020-2023
"Development of an innovative instrument dedicated to the measurement of peroxyl radicals in the atmosphere by chemical amplification" [W. Chen (LPCA) / A. Tomas (IMT)]
AL ALI Fatima 2020-2023
"Study in simulation chambers of the atmospheric reactivity of Volatile Organic Compounds (VOCs) precursors of Secondary Organic Aerosols (SOAs)"
[A. Tomas (IMT Lille-Douai) / C. Cœur (LPCA)]
DECKER Jean 2020-2023
"THz analysis of gaseous emissions from the Dunkirk energy recovery center" [A. Cuisset (LPCA)]
ELMALEH Coralie 2020-2023
"Development of an ultra-sensitive gas analysis prototype in the submillimeter field" [G. Mouret (LPCA)]
TCHANA BETNGA Wilfried 2020-2023
"Development of instrumentation for simultaneous THz and IR spectroscopy" [F. Hindle (LPCA)]
MOHAMED OMAR Aboubaker 2020-2023
"Application of laser photo-engraving to the production of components for guided optics in the mid-infrared" [P. Masselin (LPCA)]
KHABBAZ Alexandra 2021-2024
"Frequency comb and THz spectroscopy" [G. Mouret (LPCA) / JF. Lampin (CNRS - IEMN)]
Alrifai, Bouthayna, Kassem, M., Bokova, M., Fourmentin, M., Poupin, C., Toufaily, J., Bychkov, E., 2022. Lead thioarsenate system PbS–As 2 S 3 : Glass formation, macroscopic, and electric properties. J Am Ceram Soc. 105, 2605–2615. https://doi.org/10.1111/jace.18282