Séminaire

Vendredi 5 Novembre 2021 à 11h00.

Interaction of Light and Matter, from isolated molecules to liquid droplets

''This talk will be divided in three parts. In the first, I will present our efforts to build an instrument to perform metrological spectroscopic measurements on isolated molecules using buffer gas cooling, and cavity ringdown/enhanced spectroscopy. I will show preliminary results concerning H2O in the 2 OH-stretching range. In a second section, I will present our work concerning water containing van der Waals complexes probed using either CW-CRDS for neutral complexes, or action spectroscopy for charged species. The focus will be given to H2O-CO2 and our efforts in producing larger mass-selected aggregates. Finally, I will present measurements we performed to characterize the lifetime of water droplets in air, using a new method based on Mie scattering measurements. This last study was motivated by articles published in the context of the COVID-19 pandemic and led us to explore the field of mass photometry.''