Resonance Raman spectra of the overcooled laser-induced Al plasmas

X. K. Shen, H. Ling, Y. F. Lu

Research output: Contribution to conferencePaper

Abstract

Resonance Raman spectra of the overcooled laser-induced Al plasmas were studied using an optical parametric oscillator (OPO) wavelength-tunable laser (215-2550 nm, 6 ns) as the re-exciting source. Q-switched neodymium yttrium-aluminum-garnet (Nd:YAG) laser pulses (532 nm, 6 ns) with a laser fluence of 20 J/cm2 were used to generate plasmas from an Al alloy target. The laser fluence of the OPO wavelength-tunable laser was around 0.5 J/cm2. After tens of microseconds of the plasma generation, the Raman spectra were obtained with a series of wavelengths in between 300 and 322 nm. The Raman spectra of AlO radicals were clearly observed, which showed that the laser-induced Al plasmas interacted with the oxygen in the surrounding air and AlO radicals were produced. Temporal evolutions of the Al, O atoms, and AlO radicals were investigated by laser-induced breakdown spectra and Raman spectra with different time delays. The chemical dynamics of the laser-induced Al plasmas was summarized.

Original languageEnglish (US)
Pages74-78
Number of pages5
DOIs
StatePublished - 2008
EventICALEO 2008 - 27th International Congress on Applications of Lasers and Electro-Optics - Temecula, CA, United States
Duration: Oct 20 2008Oct 23 2008

Conference

ConferenceICALEO 2008 - 27th International Congress on Applications of Lasers and Electro-Optics
CountryUnited States
CityTemecula, CA
Period10/20/0810/23/08

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Shen, X. K., Ling, H., & Lu, Y. F. (2008). Resonance Raman spectra of the overcooled laser-induced Al plasmas. 74-78. Paper presented at ICALEO 2008 - 27th International Congress on Applications of Lasers and Electro-Optics, Temecula, CA, United States. https://doi.org/10.2351/1.5061363