Superradiance by molecular nitrogen ions in filaments

N. G. Ivanov, V. F. Losev, V. E. Prokop’ev, K. A. Sitnik

Research output: Contribution to journalArticle

Abstract

Results of the experimental study of population inversion in the resonant electronic transition В3Пg - А3+ u of nitrogen ions by optical pumping of atmospheric air and pure nitrogen by a femtosecond laser pulse at a wavelength of 950 nm are presented. It is shown that the inversion results from selective population of the N+ 2(B2+ u, V' = 0) excited state during multiphoton excitation of the autoionization state of the nitrogen molecule with an energy of 18.7 eV. Seed photons for superradiance at transitions of molecular nitrogen ions are photons of the axial supercontinuum that occurs in a filament at the corresponding wavelengths. The superradiance mode is implemented at the wavelength λ = 358.4 nm referred to the transition of the CN molecule.

Original languageEnglish
Pages (from-to)385-389
Number of pages5
JournalAtmospheric and Oceanic Optics
Volume29
Issue number4
DOIs
Publication statusPublished - 1 Jul 2016

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nitrogen ions
molecular ions
filaments
ion
nitrogen
wavelength
wavelengths
population inversion
autoionization
photons
optical pumping
excitation
molecules
seeds
inversions
pumping
experimental study
laser
air
pulses

Keywords

  • femtosecond laser pulse
  • filament
  • ions
  • molecule
  • multiphoton ionization
  • population inversion

ASJC Scopus subject areas

  • Oceanography
  • Atomic and Molecular Physics, and Optics
  • Earth-Surface Processes
  • Atmospheric Science

Cite this

Superradiance by molecular nitrogen ions in filaments. / Ivanov, N. G.; Losev, V. F.; Prokop’ev, V. E.; Sitnik, K. A.

In: Atmospheric and Oceanic Optics, Vol. 29, No. 4, 01.07.2016, p. 385-389.

Research output: Contribution to journalArticle

Ivanov, N. G. ; Losev, V. F. ; Prokop’ev, V. E. ; Sitnik, K. A. / Superradiance by molecular nitrogen ions in filaments. In: Atmospheric and Oceanic Optics. 2016 ; Vol. 29, No. 4. pp. 385-389.
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