A1 Refereed original research article in a scientific journal
Robust two-dimensional subrecoil Raman cooling by adiabatic transfer in a tripod atomic system
Authors: Ivanov VS, Rozhdestvensky YV, Suominen KA
Publisher: AMER PHYSICAL SOC
Publication year: 2012
Journal: Physical Review A
Journal name in source: PHYSICAL REVIEW A
Journal acronym: PHYS REV A
Article number: ARTN 033409
Number in series: 3
Volume: 86
Issue: 3
Number of pages: 7
ISSN: 1050-2947
DOI: https://doi.org/10.1103/PhysRevA.86.033409(external)
Abstract
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.
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.
UTU Research Portal