Interaction of frequency modulated light pulses with rubidium atoms in a magneto-optical trap

J. Bakos, G. Djotyan, P. N. Ignácz, M. Á Kedves, M. Serényi, Zs Sörlei, J. Szigeti, Z. Tóth

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The spatial displacement of the 85Rb atoms in a Magneto-Optical Trap (MOT) under the influence of series of frequency modulated light pulse pairs propagating opposite to each other is measured as a function of the time elapsed after the start of the pulse train, and compared with the results of simulations. Adiabatic excitation and consecutive de-excitation take place between the ground 52S1/2 (F=3) and the 5 2P3/2 (F'=2, 3, 4) excited levels as the result of the interaction. The displacement of the 85Rb atoms is calculated as the solution of simple equation of motion where the expelling force is that arising from the action of the frequency modulated light pulses. The restoring and friction forces of the MOT are taken into account also. The system of Bloch equations for the density matrix elements is solved numerically for transitions between six working hyperfine levels of the atom interacting with the sequence of the frequency modulated laser pulses. According to these simulations, the momentum transferred by one pulse pair is always smaller than the expected 2Latin small letter h with strokek, (1) where Latin small letter h with stroke is the Plank constant and k=2π/λ where λ is the wavelength, (2) having a maximum value in a restricted region of variation of the laser pulse peak intensity and the chirp.

Original languageEnglish
Pages (from-to)59-66
Number of pages8
JournalEuropean Physical Journal D
Volume39
Issue number1
DOIs
Publication statusPublished - Jul 2006

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rubidium
traps
pulses
atoms
interactions
chirp
strokes
excitation
lasers
equations of motion
friction
simulation
momentum
wavelengths

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics

Cite this

Interaction of frequency modulated light pulses with rubidium atoms in a magneto-optical trap. / Bakos, J.; Djotyan, G.; Ignácz, P. N.; Kedves, M. Á; Serényi, M.; Sörlei, Zs; Szigeti, J.; Tóth, Z.

In: European Physical Journal D, Vol. 39, No. 1, 07.2006, p. 59-66.

Research output: Contribution to journalArticle

Bakos, J. ; Djotyan, G. ; Ignácz, P. N. ; Kedves, M. Á ; Serényi, M. ; Sörlei, Zs ; Szigeti, J. ; Tóth, Z. / Interaction of frequency modulated light pulses with rubidium atoms in a magneto-optical trap. In: European Physical Journal D. 2006 ; Vol. 39, No. 1. pp. 59-66.
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