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Sodium Atoms Stopped and Confined

Arthur L. Robinson

Trapped, motionless atoms or molecules constitute an ideal sample for spectroscopy. Two groups have recently confined sodium atoms, in one case by magnetic fields and in the other by optical means employing laser radiation. These two methods are described and their problems and limitations considered.

ScienceJul 5, 19850 citations

Trapping and Stopping/Cooling of Atoms, Particles, and Bio-components Using Laser Light

Elsevier eBooksJan 1, 20180 citations

Deflection of a Sodium Atomic Beam by Light Pressure Exerted by Absorption from a Multiple Laser Beam

W. Yuzhu, Z. Rufang, Z. Zhiyao +2 more

Springer series in optical sciences/SPringer series in optical sciencesJan 1, 19830 citations

Continuous stopping and trapping of neutral atoms

Vanderlei Salvador Bagnato, Gregory P. Lafyatis, Alexander G. Martin +2 more

We have continuously stopped thermal sodium atoms with laser light and loaded them into a 0.1-K deep superconducting magnetic trap. The trap is formed by a local minimum of the magnetic field produced by two superconducting coils and a radially confining octupole field. The atoms are slowed and stopped in two stages: The atoms are first slowed to ~200 m/s using a counterpropagating resonant laser beam and tapered magnetic field to compensate for the changing Doppler shift as the atoms are slowed.1 A second laser beam and tapered magnetic field, actually located within the trap, are used to stop the atoms in the trap. This continuous loading process has allowed us to accumulate up to 1 × 109 trapped atoms, and trapping times of several minutes have been achieved. Our trap has the feature of having a uniform magnetic field at its bottom, opening up the possibility of precision spectroscopy of the trapped atoms. The fluorescence from the trapped atoms has been studied, and they have been cooled to ~1 mK using 1-D optical molasses.We have continuously stopped thermal sodium atoms with laser light and loaded them into a 0.1-K deep superconducting magnetic trap. The trap is formed by a local minimum of the magnetic field produced by two superconducting coils and a radially confining octupole field. The atoms are slowed and stopped in two stages: The atoms are first slowed to ~200 m/s using a counterpropagating resonant laser beam and tapered magnetic field to compensate for the changing Doppler shift as the atoms are slowed.1 A second laser beam and tapered magnetic field, actually located within the trap, are used to stop the atoms in the trap. This continuous loading process has allowed us to accumulate up to 1 × 109 trapped atoms, and trapping times of several minutes have been achieved. Our trap has the feature of having a uniform magnetic field at its bottom, opening up the possibility of precision spectroscopy of the trapped atoms. The fluorescence from the trapped atoms has been studied, and they have been cooled to ~1 mK using 1-D optical molasses.

Annual Meeting Optical Society of AmericaJan 1, 19870 citations

Sodium Atoms Trapped With Laser Light

Arthur L. Robinson

ScienceAug 8, 19862 citations

Laser physics: Trapping cooled sodium atoms

Brian W. Petley

NatureJun 1, 19853 citations

Sodium Atoms Stopped and Confined: Particles in a fast-moving atomic beam can be stopped in their tracks by laser light and subsequently confined in space for a second or so.

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Sodium Atoms Stopped and Confined: Particles in a fast-moving atomic beam can be stopped in their tracks by laser light and subsequently confined in space for a second or so.

Related papers