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Different laser devices working as ``atom diodes'' or ``one-way barriers''for ultra-cold atoms have been proposed recently. They transmit ground statelevel atoms coming from one side, say from the left, but reflect them when theycome from the other side. We combine a previous model, consisting of thestimulated Raman adiabatic passage (STIRAP) from the ground to an excited stateand a state-selective mirror potential, with a localized quenching laser whichproduces spontaneous decay back to the ground state. This avoids backwardsmotion, provides more control of the decay process and therefore a more compactand useful device.Comment: 6 page

Improvement by laser quenching of an ‘atom diode’: a one-way barrier for ultra-cold atoms