Laser Cooling with Adiabatic Transfer on a Raman Transition
arXiv:1805.04452 · doi:10.1088/1367-2630/ab2f3c
Abstract
A novel laser cooling mechanism was recently demonstrated using a narrow-linewidth optical transition. Counter-propagating laser beams are swept in frequency to cause adiabatic transfer between a ground state and excited state, and Doppler shifts provide time-ordering that ensures the associated photon recoils oppose the particle's motion. We now expand this technique to Rb, which has no narrow-linewidth optical transition, by using artificially-narrow two-photon Raman transitions. The cooling mechanism is capable of exerting large forces to compress the phase-space of the atomic ensemble without relying on spontaneous emission, providing further support for its potential use in cooling molecules or other particles that lack closed cycling transitions. Because the dynamics of the adiabatic transfer are crucial for assessing the feasibility of Raman SWAP cooling, we also develop a generic model for Raman Landau-Zener transitions in the presence of free-space scattering.
arXiv commentMain text: 4 pages, 4 figures. Supplemental text: 7 pages, 3 figures
References in corpus (21)
- Laser cooling of a nanomechanical oscillator into its quantum ground state
- Sideband Cooling Micromechanical Motion to the Quantum Ground State
- Laser cooling of a diatomic molecule
- Magneto-optical trapping of diatomic molecules
- Laser cooling and slowing of CaF molecules
- Sisyphus Laser Cooling of a Polyatomic Molecule
- Doppler cooling and trapping on forbidden transitions
- Optoelectrical cooling of polar molecules to sub-millikelvin temperatures
- Laser cooling to quantum degeneracy
- All-Optical Production of a Lithium Quantum Gas Using Narrow-Line Laser Cooling
- Creation of a Bose-condensed gas of rubidium 87 by laser cooling
- Narrow Line Cooling: Finite Photon Recoil Dynamics
- Narrow-line magneto-optical cooling and trapping of strongly magnetic atoms
- Narrow-line Laser Cooling by Adiabatic Transfer
- Coherent Bichromatic Force Deflection of Molecules
- Fast and dense magneto-optical traps for Strontium
- Cavity cooling of many atoms
- Improving Raman velocimetry of laser-cooled cesium atoms by spin-polarization
- Efficient polarization of high-angular-momentum systems
- Sawtooth wave adiabatic passage slowing of dysprosium
- Interferometric laser cooling of atomic rubidium