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Laser cooling of an indium atomic beam enabled by magnetic fields

B. Klöter, Claudia Weber, D. Haubrich +2 more

We demonstrate magnetic field enabled optical forces on a neutral indium atomic beam in a light field consisting of five frequencies. The role of dark magnetic ground state sublevels is studied and enables us to cool the atomic beam transversely to near the Doppler limit with laser frequencies tuned above the atomic resonance. The effect of laser cooling can be explained with transient effects in the light potential created by the standing wave light field where the atoms are optically pumped into the dark states and recycled by Larmor precession.We demonstrate magnetic field enabled optical forces on a neutral indium atomic beam in a light field consisting of five frequencies. The role of dark magnetic ground state sublevels is studied and enables us to cool the atomic beam transversely to near the Doppler limit with laser frequencies tuned above the atomic resonance. The effect of laser cooling can be explained with transient effects in the light potential created by the standing wave light field where the atoms are optically pumped into the dark states and recycled by Larmor precession.

Physical Review AMar 5, 200831 citations

Laser cooling of an atomic beam

William D. Phillips, John V. Prodan, Harold J. Metcalf

Conference on Lasers and Electro-OpticsJan 1, 19831 citation

Laser Cooling of Atoms

Hidekazu Hachisu

Nihon Kikai Gakkaishi/Journal of the Japan Society of Mechanical EngineersJan 1, 20090 citations

Laser cooling of a magnetically guided ultracold atom beam

A Aghajani-Talesh, M Falkenau, Valentin Volchkov +3 more

We report on the transverse laser cooling of a magnetically guided beam of ultracold chromium atoms. Radial compression by a tapering of the guide is employed to adiabatically heat the beam. Inside the tapered section, heat is extracted from the atom beam by a two-dimensional (2D) optical molasses perpendicular to it, resulting in a significant increase in atomic phase space density. A magnetic offset field is applied to prevent optical pumping to untrapped states. Our results demonstrate that, by a suitable choice of the magnetic offset field, the cooling beam intensity and detuning, atom losses and longitudinal heating can be avoided. Final temperatures below 65 μK have been achieved, corresponding to an increase in phase space density in the guided beam by more than a factor of 30.We report on the transverse laser cooling of a magnetically guided beam of ultracold chromium atoms. Radial compression by a tapering of the guide is employed to adiabatically heat the beam. Inside the tapered section, heat is extracted from the atom beam by a two-dimensional (2D) optical molasses perpendicular to it, resulting in a significant increase in atomic phase space density. A magnetic offset field is applied to prevent optical pumping to untrapped states. Our results demonstrate that, by a suitable choice of the magnetic offset field, the cooling beam intensity and detuning, atom losses and longitudinal heating can be avoided. Final temperatures below 65 μK have been achieved, corresponding to an increase in phase space density in the guided beam by more than a factor of 30.

arXiv:1002.0233New Journal of PhysicsJun 28, 20109 citations

Zeeman laser cooling of 85Rb atoms in transverse magnetic field

Павел Николаевич Мелентьев, P. A. Borisov, V. I. Balykin

The process of Zeeman laser cooling of 85 Rb atoms in a new scheme employing a transverse magnetic field has been experimentally studied. Upon cooling, the average velocity of atoms was 12 m/s at a beam intensity of 7.2×10 12 s −1 and an atomic density of 4.7×10 10 cm −3 .

Journal of Experimental and Theoretical PhysicsApr 1, 200410 citations

Laser Cooling of Free Neutral Atoms in an Atomic Beam

William D. Phillips, John V. Prodan, H. Metcalf

Springer series in optical sciences/SPringer series in optical sciencesJan 1, 19837 citations

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