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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 28, Iss. 3 — Mar. 1, 2011
  • pp: 462–467

Switching from a sequential transition to quantum beating in atomic rubidium pumped by a femtosecond laser

Gombojav O. Ariunbold, Vladimir A. Sautenkov, and Marlan O. Scully  »View Author Affiliations


JOSA B, Vol. 28, Issue 3, pp. 462-467 (2011)
http://dx.doi.org/10.1364/JOSAB.28.000462


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Abstract

We demonstrate temporal coherent control in two-photon transitions. A pair of broadband ( Δ λ 20 nm ), ultrashort ( Δ t 100 fs ), collinear pulses with a variable time delay excites the rubidium atoms into the 5 D state from the 5 S ground state where the two-photon transitions are enhanced by the intermediate level 5 P . The excited atoms radiate 5 μm ( 5 D 6 P ) and 420 nm ( 6 P 5 S ) light. As a result of tuning the wavelength of the input laser, a superfluorescence at 420 nm exhibits different temporal behaviors. A switching from a beating at the frequency given by the difference between the sequential atomic transitions that involve the 5 P 3 / 2 intermediate level, to a quantum beating due to two different two-photon excitation paths, 5 S 5 P 1 / 2 5 D and 5 S 5 P 3 / 2 5 D is observed. Based on the simple atom-field interaction theory, an analytic solution, which qualitatively elucidates experimental results, is obtained.

© 2011 Optical Society of America

OCIS Codes
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.1670) Atomic and molecular physics : Coherent optical effects
(140.6630) Lasers and laser optics : Superradiance, superfluorescence
(190.7110) Nonlinear optics : Ultrafast nonlinear optics

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: September 9, 2010
Revised Manuscript: December 10, 2010
Manuscript Accepted: December 13, 2010
Published: February 23, 2011

Citation
Gombojav O. Ariunbold, Vladimir A. Sautenkov, and Marlan O. Scully, "Switching from a sequential transition to quantum beating in atomic rubidium pumped by a femtosecond laser," J. Opt. Soc. Am. B 28, 462-467 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-3-462

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