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 language | English |
|---|---|
| Pages (from-to) | 385-389 |
| Number of pages | 5 |
| Journal | Atmospheric and Oceanic Optics |
| Volume | 29 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1 Jul 2016 |
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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 journal › Article
}
TY - JOUR
T1 - Superradiance by molecular nitrogen ions in filaments
AU - Ivanov, N. G.
AU - Losev, V. F.
AU - Prokop’ev, V. E.
AU - Sitnik, K. A.
PY - 2016/7/1
Y1 - 2016/7/1
N2 - 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.
AB - 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.
KW - femtosecond laser pulse
KW - filament
KW - ions
KW - molecule
KW - multiphoton ionization
KW - population inversion
UR - http://www.scopus.com/inward/record.url?scp=84983517431&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84983517431&partnerID=8YFLogxK
U2 - 10.1134/S1024856016040072
DO - 10.1134/S1024856016040072
M3 - Article
AN - SCOPUS:84983517431
VL - 29
SP - 385
EP - 389
JO - Atmospheric and Oceanic Optics
JF - Atmospheric and Oceanic Optics
SN - 1024-8560
IS - 4
ER -