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Title: Spatial and temporal distribution of metal atoms and their diatomic oxide molecules in femtosecond laser-induced plasmas

Abstract

Here, we investigate the distribution of atoms and diatomic metal-oxide molecules in femtosecond laser-induced plasmas generated at and after the laser beam focal plane, where non-linear phenomena give rise to the formation of a weakly ionized air plasma channel. We use direct plasma imaging and optical emission spectroscopy to study plasma expansion, and the associated physical and chemical separation processes. Plasma splitting occurs upon the interaction of the weakly ionized plasma with the sample and is accompanied by a change in the spatio-temporal distribution of the molecules and atoms compared to sampling at the focus. Furthermore, molecular emission is favored at specific locations and is enhanced over atomic emission as the sample is moved underneath the laser focus. These findings support the ability to enhance or impede the formation of molecular versus atomic species at specific spatio-temporal locations in the laser-induced plasma.

Authors:
 [1];  [2];  [2];  [3];  [3]; ORCiD logo [2]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Mokpo National Univ., Jeonnam (Republic of Korea)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Applied Spectra, Inc., Fremont, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
OSTI Identifier:
1460344
Alternate Identifier(s):
OSTI ID: 1460477
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Analytical Atomic Spectrometry
Additional Journal Information:
Journal Volume: none; Journal Issue: none; Journal ID: ISSN 0267-9477
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Lee, Yonghoon, Mao, Xianglei, Chan, George C. -Y., Gonzalez, Jhanis, Russo, Richard E., and Zorba, Vassilia. Spatial and temporal distribution of metal atoms and their diatomic oxide molecules in femtosecond laser-induced plasmas. United States: N. p., 2018. Web. doi:10.1039/C8JA00150B.
Lee, Yonghoon, Mao, Xianglei, Chan, George C. -Y., Gonzalez, Jhanis, Russo, Richard E., & Zorba, Vassilia. Spatial and temporal distribution of metal atoms and their diatomic oxide molecules in femtosecond laser-induced plasmas. United States. doi:10.1039/C8JA00150B.
Lee, Yonghoon, Mao, Xianglei, Chan, George C. -Y., Gonzalez, Jhanis, Russo, Richard E., and Zorba, Vassilia. Tue . "Spatial and temporal distribution of metal atoms and their diatomic oxide molecules in femtosecond laser-induced plasmas". United States. doi:10.1039/C8JA00150B. https://www.osti.gov/servlets/purl/1460344.
@article{osti_1460344,
title = {Spatial and temporal distribution of metal atoms and their diatomic oxide molecules in femtosecond laser-induced plasmas},
author = {Lee, Yonghoon and Mao, Xianglei and Chan, George C. -Y. and Gonzalez, Jhanis and Russo, Richard E. and Zorba, Vassilia},
abstractNote = {Here, we investigate the distribution of atoms and diatomic metal-oxide molecules in femtosecond laser-induced plasmas generated at and after the laser beam focal plane, where non-linear phenomena give rise to the formation of a weakly ionized air plasma channel. We use direct plasma imaging and optical emission spectroscopy to study plasma expansion, and the associated physical and chemical separation processes. Plasma splitting occurs upon the interaction of the weakly ionized plasma with the sample and is accompanied by a change in the spatio-temporal distribution of the molecules and atoms compared to sampling at the focus. Furthermore, molecular emission is favored at specific locations and is enhanced over atomic emission as the sample is moved underneath the laser focus. These findings support the ability to enhance or impede the formation of molecular versus atomic species at specific spatio-temporal locations in the laser-induced plasma.},
doi = {10.1039/C8JA00150B},
journal = {Journal of Analytical Atomic Spectrometry},
number = none,
volume = none,
place = {United States},
year = {2018},
month = {7}
}

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Free Publicly Available Full Text
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Cited by: 2 works
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