3D raman sideband cooling of cesium atoms at high density
We laser cool 5x10(7) Cs atoms to a spin-polarized phase space density of 1/30, the highest ever obtained by laser cooling. It is achieved by compression and polarization gradient cooling in a 3D far-off-resonant optical lattice, followed by 3D Raman sideband cooling optimized at a density of 1.5x10(12) atoms/cm(3), and adiabatic release. In the lattice, 23% of the sites are occupied, 95% of the atoms are in the lowest energy magnetic sublevel, and 37% are in the lowest 3D vibrational state.
Han
DJ
Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA.
Wolf
S
Oliver
S
McCormick
C
DePue
MT
Weiss
DS