Switching from a sequential transition to quantum beating in atomic rubidium pumped by a femtosecond laser Academic Article uri icon


  • We demonstrate temporal coherent control in two-photon transitions. A pair of broadband ( 20 nm), ultrashort (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 m (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 5P3=2 intermediate level, to a quantum beating due to two different two-photon excitation paths, 5S 5P1/2 5D and 5S 5P3/2 5D 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.

published proceedings

  • Journal of the Optical Society of America B

author list (cited authors)

  • Ariunbold, G. O., Sautenkov, V. A., & Scully, M. O.

citation count

  • 7

complete list of authors

  • Ariunbold, Gombojav O||Sautenkov, Vladimir A||Scully, Marlan O

publication date

  • March 2011