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RESEARCH PRODUCT

Stimulated Raman Adiabatic Passage via bright state in Lambda medium of unequal oscillator strengths

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International audience; We consider the population transfer process in a Lambda-type atomic medium of unequal oscillator strengths by stimulated Raman adiabatic passage via bright-state (b-STIRAP) taking into account propagation effects. Using both analytic and numerical methods we show that the population transfer efficiency is sensitive to the ratio q(p)/q(s) of the transition oscillator strengths. We find that the case q(p) > q(s) is more detrimental for population transfer process as compared to the case where q(p) <= q(s). For this case it is possible to increase medium dimensions while permitting efficient population transfer. A criterion determining the interaction adiabaticity in the course of propagation process is found. We also show that the mixing parameter characterizing the population transfer propagates superluminally.