Sub-Doppler cooling of ytterbium with the ^1S_0–^1P_1 transition including ^171Yb (I=1/2)

Single-stage sub-Doppler cooling of alkaline earth atoms.

We report the first experimental study of sub-Doppler cooling in alkaline earth atoms (87Sr) enabled by the presence of nuclear spin-originated magnetic degeneracy in the atomic ground state. Sub-Doppler cooling in a sigma(+)-sigma(-) configuration is achieved despite the presence of multiple, closely spaced excited states. This surprising result is confirmed by an expanded multilevel theory of...

Simplest Atomic System for Sub-Doppler Laser Cooling

Doppler cooling of calcium ions using a dipole-forbidden transition

Richard J. Hendricks, Jens L. Sørensen, Caroline Champenois, Martina Knoop, and Michael Drewsen* QUANTOP—Danish National Research Foundation Center for Quantum Optics, Department of Physics and Astronomy, University of Aarhus, DK-8000 Århus C, Denmark Physique des Interactions Ioniques et Moléculaires (CNRS UMR 6633), Université de Provence, Centre de Saint Jérôme, Case C21, 13397 Marseille Ced...

Sub-Doppler laser cooling of 40K with Raman gray molasses on the D2 line

Gray molasses is a powerful tool for sub-Doppler laser cooling of atoms to low temperatures. For alkaline atoms, this technique is commonly implemented with cooling lasers which are blue-detuned from either the D1 or D2 line. Here we show that efficient gray molasses can be implemented on the D2 line of K with red-detuned lasers. We obtained temperatures of m ( ) 48 2 K, which enables direct lo...

Deep sub-Doppler cooling of Mg in MOT formed by light waves with elliptical polarization

We study magneto-optical trap (MOT) of Mg atoms operating on the closed triplet P2→D3 ( = 383.3 nm) transition formed by the light waves with elliptical polarization (      configuration). Compare to well-known trap formed by light waves with circular polarization (+–– configuration) the suggested      configuration offer the lower subDoppler temperature for trapped Mg atoms, that ...