Transition of Femtosecond-Filament-Solid Interactions from Single to Multiple Filament Regime

Abstract High-peak-power fs-laser filaments offer unique characteristics attractive to remote sensing via techniques such as remote laser-induced breakdown spectroscopy (R-LIBS). The dynamics of several ablation mechanisms following the interaction between a filament and a solid determines the emiss...

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Autores principales:	P. J. Skrodzki, M. Burger, I. Jovanovic
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/aef58bd76e5b4517ad2939ff06d2ccca
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spelling	oai:doaj.org-article:aef58bd76e5b4517ad2939ff06d2ccca2021-12-02T15:04:54ZTransition of Femtosecond-Filament-Solid Interactions from Single to Multiple Filament Regime10.1038/s41598-017-13188-42045-2322https://doaj.org/article/aef58bd76e5b4517ad2939ff06d2ccca2017-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-13188-4https://doaj.org/toc/2045-2322Abstract High-peak-power fs-laser filaments offer unique characteristics attractive to remote sensing via techniques such as remote laser-induced breakdown spectroscopy (R-LIBS). The dynamics of several ablation mechanisms following the interaction between a filament and a solid determines the emission strength and reproducibility of target plasma, which is of relevance for R-LIBS applications. We investigate the space- and time-resolved dynamics of ionic and atomic emission from copper as well as the surrounding atmosphere in order to understand limitations of fs-filament-ablation for standoff energy delivery. Furthermore, we probe the shock front produced from filament-target interaction using time-resolved shadowgraphy and infer laser-material coupling efficiencies for both single and multiple filament regimes through analysis of shock expansion with the Sedov model for point detonation. The results provide insight into plasma structure for the range of peak powers up to 30 times the critical power for filamentation P cr . Despite the stochastic nucleation of multiple filaments at peak-powers greater than 16 P cr , emission of ionic and neutral species increases with pump beam intensity, and short-lived nitrogen emission originating from the ambient is consistently observed. Ultimately, results suggest favorable scaling of emission intensity from target species on the laser pump energy, furthering the prospects for use of filament-solid interactions for remote sensing.P. J. SkrodzkiM. BurgerI. JovanovicNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q P. J. Skrodzki M. Burger I. Jovanovic Transition of Femtosecond-Filament-Solid Interactions from Single to Multiple Filament Regime
description	Abstract High-peak-power fs-laser filaments offer unique characteristics attractive to remote sensing via techniques such as remote laser-induced breakdown spectroscopy (R-LIBS). The dynamics of several ablation mechanisms following the interaction between a filament and a solid determines the emission strength and reproducibility of target plasma, which is of relevance for R-LIBS applications. We investigate the space- and time-resolved dynamics of ionic and atomic emission from copper as well as the surrounding atmosphere in order to understand limitations of fs-filament-ablation for standoff energy delivery. Furthermore, we probe the shock front produced from filament-target interaction using time-resolved shadowgraphy and infer laser-material coupling efficiencies for both single and multiple filament regimes through analysis of shock expansion with the Sedov model for point detonation. The results provide insight into plasma structure for the range of peak powers up to 30 times the critical power for filamentation P cr . Despite the stochastic nucleation of multiple filaments at peak-powers greater than 16 P cr , emission of ionic and neutral species increases with pump beam intensity, and short-lived nitrogen emission originating from the ambient is consistently observed. Ultimately, results suggest favorable scaling of emission intensity from target species on the laser pump energy, furthering the prospects for use of filament-solid interactions for remote sensing.
format	article
author	P. J. Skrodzki M. Burger I. Jovanovic
author_facet	P. J. Skrodzki M. Burger I. Jovanovic
author_sort	P. J. Skrodzki
title	Transition of Femtosecond-Filament-Solid Interactions from Single to Multiple Filament Regime
title_short	Transition of Femtosecond-Filament-Solid Interactions from Single to Multiple Filament Regime
title_full	Transition of Femtosecond-Filament-Solid Interactions from Single to Multiple Filament Regime
title_fullStr	Transition of Femtosecond-Filament-Solid Interactions from Single to Multiple Filament Regime
title_full_unstemmed	Transition of Femtosecond-Filament-Solid Interactions from Single to Multiple Filament Regime
title_sort	transition of femtosecond-filament-solid interactions from single to multiple filament regime
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/aef58bd76e5b4517ad2939ff06d2ccca
work_keys_str_mv	AT pjskrodzki transitionoffemtosecondfilamentsolidinteractionsfromsingletomultiplefilamentregime AT mburger transitionoffemtosecondfilamentsolidinteractionsfromsingletomultiplefilamentregime AT ijovanovic transitionoffemtosecondfilamentsolidinteractionsfromsingletomultiplefilamentregime
_version_	1718389035623251968

Transition of Femtosecond-Filament-Solid Interactions from Single to Multiple Filament Regime

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