Doppler cooling and trapping on forbidden transitions

Abstract

Ultracold atoms at temperatures close to the recoil limit have been achieved by extending Doppler cooling to forbidden transitions. A cloud of ^40Ca atoms has been cooled and trapped to a temperature as low as 6 μK by operating a magneto-optical trap on the spin-forbidden intercombination transition. Quenching the long-lived excited state with an additional laser enhanced the scattering rate by a factor of 15, while a high selectivity in velocity was preserved. With this method more than 10% of pre-cooled atoms from a standard magneto-optical trap have been transferred to the ultracold trap. Monte-Carlo simulations of the cooling process are in good agreement with the experiments.

Cited by in corpus (54)

• Nuclear Spin Effects in Optical Lattice Clocks
• Bose-Einstein condensation of alkaline earth atoms: ${}^{40}${Ca}
• An Optical Clock with Ultracold Neutral Atoms
• Properties of metastable alkaline-earth-metal atoms calculated using an accurate effective core potential
• All-Optical Production of a Lithium Quantum Gas Using Narrow-Line Laser Cooling
• Phase-dependent interaction in a 4-level atomic configuration
• Precision spectroscopy and density-dependent frequency shifts in ultracold Sr
• Narrow Line Cooling and Momentum-Space Crystals
• Narrow Line Cooling: Finite Photon Recoil Dynamics
• The optical calcium frequency standards of PTB and NIST
• Narrow-line magneto-optical cooling and trapping of strongly magnetic atoms
• Laser cooling for quantum gases
• Optimized production of large Bose Einstein Condensates
• Efficient magneto-optical trapping of Yb atoms with a violet laser diode
• Quenched narrow-line second- and third-stage laser cooling of 40Ca
• Scattering length of the ground state Mg+Mg collision
• Optical cooling and trapping of highly magnetic atoms: The benefits of a spontaneous spin polarization
• Prospects for sympathetic cooling of polar molecules: NH with alkali-metal and alkaline-earth atoms - a new hope
• Laser cooling and trapping of atomic strontium for ultracold atom physics, high-precision spectroscopy and quantum sensors
• Multiple species atom source for laser-cooling experiments
• Reservoir spectroscopy of 5s5p ${}^3$P${}_2$ - 5s$n$d ${}^3$D${}_{1,2,3}$ transitions in strontium
• Absolute frequency measurement of the magnesium intercombination transition ${}^1{S}_0{\to }^3{P}_1$
• Three dimensional cooling and trapping with a narrow line
• Doppler cooling of calcium ions using a dipole-forbidden transition
• Two-Photon Doppler cooling of alkaline-earth-metal and ytterbium atoms
• Magnetic Trapping of Metastable Calcium Atoms
• A multi-photon magneto-optical trap
• Sub-recoil clock-transition laser cooling enabling shallow optical lattice clocks
• Three-dimensional laser cooling at the Doppler limit
• Laser Cooling of Transition Metal Atoms
• Observation of Large Atomic-Recoil Induced Asymmetries in Cold Atom Spectroscopy
• Continuous loading of ${}^1$S${}_0$ calcium atoms into an optical dipole trap
• Crossed-Beam slowing to enhance narrow-line Ytterbium Magneto-Optic Traps
• Two-photon and EIT-assisted Doppler cooling in a three-level cascade system
• Quantum treatment of two-stage sub-Doppler laser cooling of magnesium atoms
• Perspectives for coherent optical formation of strontium molecules in their electronic ground state
• Narrow-linewidth cooling of ${}^6$Li atoms using the 2S-3P transition
• A novel route to Bose-Einstein condensation of two-electron atoms
• Multivalent optical cycling centers in polyatomic molecules
• Scaling Law in Laser Cooling on Narrow-Line Optical Transitions
• Direct laser cooling Al+ ions optical clocks
• Systematic study of tunable laser cooling for trapped-ion experiments
• Sub-Doppler laser cooling of ${}^{39}$K via the 4S$\to$5P transition
• Inelastic collisions of optically trapped metastable calcium atoms
• Two-step Doppler cooling of a three-level ladder system with an intermediate metastable level
• All-optical cooling of Fermi gases via Pauli inhibition of spontaneous emission
• Laser Cooling with Adiabatic Transfer on a Raman Transition
• Temperature limits in laser cooling of free atoms with three-level cascade transitions
• Doppler cooling to the recoil limit using sharp atomic transitions
• Two-photon cooling of calcium atoms
• Weak values obtained from mass-energy equivalence
• Laser Cooling at Resonance
• Two-photon photo-ionization of the Ca 4s3d 1D2 level in an optical dipole trap
• The generalized relativistic effective core potential calculations of the adiabatic potential curve and spectroscopic constants for the ground electronic state of the Ca2