Publications

Laser induced aerosol formation mediated by resonant excitation of volatile organic compounds

Author(s)
V. Shumakova, E. Schubert, T. Balciunas, M. Matthews, S. Alisauskas, D. Mongin, A. Pugzlys, J. Kasparian, A. Baltuska, J.-P. Wolf
Abstract

Since its first demonstration, laser induced aerosol formation (LIAF) has been studied in various environmental conditions and laser parameters. LIAF driven by UV and near-IR lasers mainly relies on the nitrogen photo-oxidative chemistry, leading to the production of hygroscopic HNO3, which stabilizes the growth of aerosol nanoparticles. Mid-IR lasers were expected to be drastically less effective for LIAF, due to their much lower multiphoton photodissociation and ionization rates. Here, we report on the observation of surprisingly high yields of nanometric and sub-mu m aerosol formation driven by mid-IR laser pulses, which cannot be explained by the HNO3-pathway. We hereby evidence a new mechanism of aerosol stabilization and growth, based on the resonant excitation of volatile organic compounds (VOCs) by mid-IR pulses whose spectrumis broadened during filamentation. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.

Organisation(s)
Faculty Center for Nano Structure Research
External organisation(s)
Center for Physical Sciences and Technology, Université de Genève, Technische Universität Wien
Journal
Optica
Volume
8
Pages
1256-1261
No. of pages
6
ISSN
2334-2536
DOI
https://doi.org/10.1364/OPTICA.434659
Publication date
10-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103021 Optics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/laser-induced-aerosol-formation-mediated-by-resonant-excitation-of-volatile-organic-compounds(4cb1e566-07c5-484d-b3e8-d6ea3235f7a2).html