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Two-dimensional magneto-optical trap for neutral atoms

A magneto-optical trap and three-dimensional magnetic field technology, which can be used in the manipulation of neutral particles by radiation pressure, optics, optical components, etc., and can solve problems such as limited optical channel geometry.

Active Publication Date: 2013-03-13
THE HONG KONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In addition, in conventional 2D magneto-optical traps, the optical channel is limited due to its geometry, and the OD also needs to be further improved

Method used

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  • Two-dimensional magneto-optical trap for neutral atoms
  • Two-dimensional magneto-optical trap for neutral atoms
  • Two-dimensional magneto-optical trap for neutral atoms

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Embodiment Construction

[0024] overview

[0025] The 2D MOT system uses 6 trapping laser beams. The two-dimensional magneto-optical trap does not trap the laser beam on the axis of symmetry, thus reserving all optical channels for further experiments. When performing quantum optics experiments, there is no need to turn off the magnetic field to maintain long atomic coherence times. the following to 85 Rb atom is taken as an example for illustration. The principles described here can be applied to other neutral atoms.

[0026] In one embodiment, a 2D MOT device comprises a compact bakeable ultrahigh vacuum absorber cell, a single hollow wire magnetic field coil, and an optical arrangement with 6 trapping laser beams. Bakeable ultrahigh vacuum cells include optical quality glass cells, all-metal hexagonal chambers, atomic release sources, ion pumps, and turbomolecular pumps. Glass pools can be octagonal or rectangular. Field coils in a single-wire design generate a two-dimensional quadrupole magn...

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Abstract

A two-dimensional (2D) magneto-optical trap (MOT) for alkali neutral atoms establishes a zero magnetic field along the longitudinal symmetry axis. Two of three pairs of trapping laser beams do not follow the symmetry axes of the quadruple magnetic field and are aligned with a large non-zero degree angles to the longitudinal axis. In a dark-line 2D MOT configuration, there are two orthogonal repumping beams. In each repumping beam, an opaque line is imaged to the longitudinal axis, and the overlap of these two line images creates a dark line volume in the longitudinal axis where there is no repumping light. The zero magnetic field along the longitudinal axis allows the cold atoms maintain a long ground-state coherence time without switching off the MOT magnetic field, which makes it possible to operate the MOT at a high repetition rate and a high duty cycle.

Description

[0001] Cross References to Related Applications [0002] This application for patent claims Provisional Patent Application File No. 61 / 573,081 filed on August 29, 2011 assigned to its assignee and at least one inventor and filed on February 23, 2012 by its inventor Priority to Provisional Patent Application No. 61 / 634,086 filed and assigned to its assignee, both of which are hereby incorporated by reference. technical field [0003] The present disclosure relates to neutral atom trapping devices with high optical thickness for use in quantum optics experiments. Background technique [0004] Since the development of laser cooling and imprisoning technology in the 1980s [E.L.Raab, M.Prentiss, A.Cable, S.Chu, and D.E.Pritchard, Phys.Rev.Lett.59, 2631 (1987)] (it was obtained in 1997 annual Nobel Prize in Physics), [0005] Magneto-optical traps (MOTs) have been widely used and implemented in the fields of atomic physics and quantum optics to provide cold atom sources for scie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21K1/00
CPCG21K1/006G02B27/00
Inventor 杜胜望张善超周蜀渝殷光裕钦梅・贝尔坦加蒂
Owner THE HONG KONG UNIV OF SCI & TECH
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