Université Paul Sabatier - Bat. 3R1b4 - 118 route de Narbonne 31062 Toulouse Cedex 09, France

Accueil > Publications > Publications par année > Année 2007

Coherent Control of Light Shifts in an Atomic system : Modulation of the Medium Gain

A sequence of two femtosecond coherent pulses—a strong pi-polarized pulse and a weak sigma-polarized pulse—excite the S1/2-P1/2 transition of atomic rubidium in an optically dense vapor. The sigma pulse induces transitions between the adiabatic states with a coupling strength that is different for identically and oppositely light-shifted coupled states, and that can be modified by tuning the relative phase between the pulses. An efficient control of the medium gain for the sigma pulse is experimentally demonstrated. It is shown to be the result of interference between the absorption and the stimulated emission paths for sigma photons.


Voir en ligne : Phys. Rev. Lett. 98, 053602 (2007)