Nonlinear spectroscopy of alkali atoms in cold medium of astrophysical relevance

Dmitry K. Efimov, Martins Bruvelis, Nikolai N. Bezuglov, Milan S. Dimitrijević, Andrey N. Klyucharev, Vladimir A. Srećković, Yurij N. Gnedin, Francesco Fuso

Research output

1 Citation (Scopus)

Abstract

The time-dependent population dynamics of hyperfine (HF) sublevels of n2p3/2 atomic states upon laser excitation in a cold medium of alkali atoms is examined. We demonstrate some peculiarities of the absorption HF multiplet formation in D2-line resulting from a long interaction time (~200 μs) interaction between light and Na (n = 3) and Cs (n = 6) atoms in a cold and slow sub-thermal (T ~ 1K) beam. We analytically describe a number of D2-line-shape effects that are of interest in spectroscopic studies of cold dusty white dwarfs: broadening by optical pumping, intensity redistribution within components of D2-line HF multiplet for partially closed transitions and asymmetry of absorption lines induced by AC Stark shifts for cyclic transitions.

Original languageEnglish
Article number50
JournalAtoms
Volume5
Issue number4
DOIs
Publication statusPublished - 1 Dec 2017

Fingerprint

alkalies
astrophysics
fine structure
optical pumping
spectroscopy
atoms
line shape
alternating current
asymmetry
interactions
shift
excitation
lasers

Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Efimov, D. K., Bruvelis, M., Bezuglov, N. N., Dimitrijević, M. S., Klyucharev, A. N., Srećković, V. A., ... Fuso, F. (2017). Nonlinear spectroscopy of alkali atoms in cold medium of astrophysical relevance. Atoms, 5(4), [50]. https://doi.org/10.3390/atoms5040050
Efimov, Dmitry K. ; Bruvelis, Martins ; Bezuglov, Nikolai N. ; Dimitrijević, Milan S. ; Klyucharev, Andrey N. ; Srećković, Vladimir A. ; Gnedin, Yurij N. ; Fuso, Francesco. / Nonlinear spectroscopy of alkali atoms in cold medium of astrophysical relevance. In: Atoms. 2017 ; Vol. 5, No. 4.
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Efimov, DK, Bruvelis, M, Bezuglov, NN, Dimitrijević, MS, Klyucharev, AN, Srećković, VA, Gnedin, YN & Fuso, F 2017, 'Nonlinear spectroscopy of alkali atoms in cold medium of astrophysical relevance', Atoms, vol. 5, no. 4, 50. https://doi.org/10.3390/atoms5040050

Nonlinear spectroscopy of alkali atoms in cold medium of astrophysical relevance. / Efimov, Dmitry K.; Bruvelis, Martins; Bezuglov, Nikolai N.; Dimitrijević, Milan S.; Klyucharev, Andrey N.; Srećković, Vladimir A.; Gnedin, Yurij N.; Fuso, Francesco.

In: Atoms, Vol. 5, No. 4, 50, 01.12.2017.

Research output

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AU - Efimov, Dmitry K.

AU - Bruvelis, Martins

AU - Bezuglov, Nikolai N.

AU - Dimitrijević, Milan S.

AU - Klyucharev, Andrey N.

AU - Srećković, Vladimir A.

AU - Gnedin, Yurij N.

AU - Fuso, Francesco

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AB - The time-dependent population dynamics of hyperfine (HF) sublevels of n2p3/2 atomic states upon laser excitation in a cold medium of alkali atoms is examined. We demonstrate some peculiarities of the absorption HF multiplet formation in D2-line resulting from a long interaction time (~200 μs) interaction between light and Na (n = 3) and Cs (n = 6) atoms in a cold and slow sub-thermal (T ~ 1K) beam. We analytically describe a number of D2-line-shape effects that are of interest in spectroscopic studies of cold dusty white dwarfs: broadening by optical pumping, intensity redistribution within components of D2-line HF multiplet for partially closed transitions and asymmetry of absorption lines induced by AC Stark shifts for cyclic transitions.

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