Population trapping of excited atoms in strong chirped laser pulses
A. M. Popov, Olga V. Tikhonova, Ekaterina A. Volkova
The population trapping in highly excited atomic states under intense femtosecond Ti:sapphire transform limited and chirped laser pulse action is studied. It is demonstrated that trapping appears as a result of the multiphoton resonance between the initial ground state and a set of excited states near the continuum boundary accompanied by repopulation of the Rydberg states by the Raman Λ-type transitions via the continuum and the interference stabilization. The specific features of the population trapping in both positively and negatively chirped pulses are analyzed and discussed.
Journal of Physics B Atomic Molecular and Optical Physics•Oct 8, 2014•9 citations