title: Laser vaporization of cirrus-like ice particles with secondary ice multiplication.
abstract: We investigate the interaction of ultrashort laser filaments with individual 90-μm ice particles, representative of cirrus particles. The ice particles fragment under laser illumination. By monitoring the evolution of the corresponding ice/vapor system at up to 140,000 frames per second over 30 ms, we conclude that a shockwave vaporization supersaturates the neighboring region relative to ice, allowing the nucleation and growth of new ice particles, supported by laser-induced plasma photochemistry. This process constitutes the first direct observation of filament-induced secondary ice multiplication, a process that strongly modifies the particle size distribution and, thus, the albedo of typical cirrus clouds.
authors.affiliation: Université de Genève, GAP-Biophotonics, Chemin de Pinchat 22, 1211 Geneva 4, Switzerland.
authors.forename: Mary
authors.initials: M
authors.lastname: Matthews
authors.affiliation: Université de Genève, GAP-Biophotonics, Chemin de Pinchat 22, 1211 Geneva 4, Switzerland.
authors.forename: François
authors.initials: F
authors.lastname: Pomel
authors.affiliation: Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
authors.forename: Christiane
authors.initials: C
authors.lastname: Wender
authors.affiliation: Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
authors.forename: Alexei
authors.initials: A
authors.lastname: Kiselev
authors.affiliation: Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
authors.forename: Denis
authors.identifier: 0000-0003-2943-3574
authors.initials: D
authors.lastname: Duft
authors.affiliation: Université de Genève, GAP-Nonlinear, Chemin de Pinchat 22, 1211 Geneva 4, Switzerland.
authors.forename: Jérôme
authors.identifier: 0000-0003-2398-3882
authors.initials: J
authors.lastname: Kasparian
authors.affiliation: Université de Genève, GAP-Biophotonics, Chemin de Pinchat 22, 1211 Geneva 4, Switzerland.
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Wolf
authors.affiliation: Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
authors.forename: Thomas
authors.identifier: 0000-0001-9693-7671
authors.initials: T
authors.lastname: Leisner
mesh_terms: D007053:Ice; D007834:Lasers; D008962:Models, Theoretical; D014835:Volatilization
chemical_list: D007053:Ice
keywords: Nucleation; cirrus; ice particle; laser filamentation; ultrafast optics; ultrashort laser