Laser-induced condensation by ultrashort laser pulses at 248 nm

Joly, Pierre; Petrarca, Massimo; Vogel, A.; Pohl, T.; Nagy, T.; Jusforgues, Q.; Simon, P.; Kasparian, Jérôme; Weber, K.; Wolf, Jean-Pierre

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Title		Laser-induced condensation by ultrashort laser pulses at 248 nm
Authors		Joly, Pierre Petrarca, Massimo Vogel, A. Pohl, T. Nagy, T. Jusforgues, Q. Simon, P. Kasparian, Jérôme Weber, K. Wolf, Jean-Pierre show all authors [1 - 10]
Published in		Applied Physics Letters. 2013, vol. 102, no. 9, p. 091112
Abstract		We compare laser-induced condensation by UV laser pulses of femtosecond, sub-picosecond, and nanosecond duration between each other, as well as with respect to near-infrared (NIR) (800 nm) ultrashort laser pulses. Particle nucleation by UV pulses is so efficient that their growth beyond several hundreds of nm is limited by the local concentration of water vapour molecules. Furthermore, we evidence a dual mechanism: While condensation induced by ultrashort UV pulses rely on nitrogen photo-oxidative chemistry like in the NIR, nanosecond laser-induced condensation occurs without NO2 production, evidencing the domination of a mechanism distinct from that previously identified in the femtosecond regime.
Keywords		Condensation — Ultraviolet light — Ultraviolet lasers — Nanoparticles — Nucleation
Identifiers		DOI: 10.1063/1.4794416
Full text		Article (Published version) (1 MB) - Free access Other version: http://scitation.aip.org/content/aip/journal/apl/102/9/10.1063/1.4794416
Structures		Centres et instituts / Institut des sciences de l'environnement Faculté des sciences / Section de physique / Groupe de physique appliquée
Research groups		ISE Pôle Sciences ISE Climat
Citation (ISO format)		JOLY, Pierre et al. Laser-induced condensation by ultrashort laser pulses at 248 nm. In: Applied Physics Letters, 2013, vol. 102, n° 9, p. 091112. https://archive-ouverte.unige.ch/unige:37060