Robust two-dimensional subrecoil Raman cooling by adiabatic transfer in a tripod atomic system



: Ivanov VS, Rozhdestvensky YV, Suominen KA

Publisher: AMER PHYSICAL SOC

: 2012

: Physical Review A

: PHYSICAL REVIEW A

: PHYS REV A

: ARTN 033409

: 3

: 86

: 3

: 7

: 1050-2947

DOI: https://doi.org/10.1103/PhysRevA.86.033409


We demonstrate two-dimensional robust Raman cooling in a four-level tripod system, in which velocity selective population transfer is achieved by a stimulated Raman adiabatic passage. In contrast to basic two-dimensional Raman cooling with square-envelope pulses [Phys. Rev. A 83, 023407 (2011)], the technique presented here allows for a wide variation in the pulse duration and amplitude once the adiabaticity criterion is satisfied. An efficient population transfer together with attainment of a narrow spread of the resonant-velocity group leads to the narrowing of the velocity-distribution spread down to 0.1 upsilon(rec), corresponding to an effective temperature equal to 0.01T(rec). This robust method opens additional possibilities for cooling of neutral atoms.



Last updated on 2024-26-11 at 20:46