Laser-induced molecular fluorescence diagnosis of aluminum monoxide evolution in laser-induced plasma

Jiaming Li, Manling Xu, Xiangyou Li, Qiongxiong Ma, Nan Zhao, Qingmao Zhang, Liang Guo, Yongfeng Lu

Research output: Contribution to journalArticle

Abstract

Molecular evolution in laser-induced breakdown spectroscopy (LIBS) is conventionally diagnosed by observing molecular spontaneous emission (SE). In this work, laser-induced molecular fluorescence (LIMF) was introduced to investigate molecular evolution in laser-induced plasma. Aluminium monoxide (AlO) was taken as a typical example for demonstration. AlO molecules in the X2Σ+ state were stimulated by a 484.82 nm laser beam, and then 510.21 nm fluorescence was observed. Compared with conventional SE in LIBS, the proposed LIMF demonstrated that it took more time to fully combine aluminum and oxygen atoms to AlO molecules. Moreover, the longer lifetime of the AlO in plasma was observed.

Original languageEnglish (US)
Article number55701
JournalLaser Physics Letters
Volume16
Issue number5
DOIs
Publication statusPublished - Apr 10 2019

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Keywords

  • Laser-induced breakdown spectroscopy (LIBS)
  • aluminum monoxide (AlO)
  • laser-induced fluorescence
  • laser-induced plasma

ASJC Scopus subject areas

  • Instrumentation
  • Physics and Astronomy (miscellaneous)

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