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Steady state behaviour in atomic three-level lambda and ladder systems with incoherent population pumping

M. Blaauboer
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Abstract

The steady state in three-level lambda and ladder systems is studied. It is well-known that in a lambda system this steady state is the coherent population trapping state, independent of the presence of spontaneous emission. In contrast, the steady state in a ladder system is in general not stable against radiative decay and exhibits a minimum in the population of the ground state. It is shown that incoherent population pumping destroys the stability of the coherent population trapping state in the lambda system and suppresses a previously discovered sharp dip in the steady state response. In the ladder system the observed minimum disappears in the presence of an incoherent pump on the upper transition.

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M. Blaauboer. 1997-01-06. Steady state behaviour in atomic three-level lambda and ladder systems with incoherent population pumping. https://doi.org/10.1103/physreva.55.2459

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