Laser Cooling of 85Rb Atoms to the Recoil Temperature Limit

Abstract

We demonstrate the laser cooling of 85Rb atoms in a two-dimensional optical lattice. We follow the two-step degenerate Raman sideband cooling scheme [Kerman et al., Phys. Rev. Lett. 84, 439 (2000)], where a fast cooling of atoms to an auxiliary state is followed by a slow cooling to a dark state. This method has the advantage of independent control of the heating rate and cooling rate from the optical pumping beam. We operate the lattice at a Lamb-Dicke parameter eta=0.45 and show the cooling of spin-polarized 85Rb atoms to the recoil temperature in both dimension within 2.4 ms with the aid of adiabatic cooling.

References in corpus (9)

• Atom Interferometers
• Site-resolved Imaging of Fermionic Lithium-6 in an Optical Lattice
• Test of Equivalence Principle at $10^{-8}$ Level by a Dual-species Double-diffraction Raman Atom Interferometer
• Cooling a single atom in an optical tweezer to its quantum ground state
• Creation of a Bose-condensed gas of rubidium 87 by laser cooling
• Feshbach resonances in ultracold 85Rb-87Rb and 6Li-87Rb mixtures
• Rb-85 tunable-interaction Bose-Einstein condensate machine
• Feshbach spectroscopy of an ultracold mixture of ${}^{85}$Rb and ${}^{133}$Cs
• Degenerate Raman sideband cooling of 39K

Cited by in corpus (3)

• Dark-state sideband cooling in an atomic ensemble
• Degenerate Raman sideband cooling of 40K atoms
• Sub-Doppler laser cooling of ${}^{39}$K via the 4S$\to$5P transition