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A misaligned magneto-optical trap to enable miniaturized atom chip systems

A misaligned magneto-optical trap to enable miniaturized atom chip systems
A misaligned magneto-optical trap to enable miniaturized atom chip systems

We describe the application of displaced, or misaligned, beams in a mirror-based magneto-optical trap (MOT) to enable portable and miniaturized atom chip experiments where optical access is limited to a single window. Two different geometries of beam displacement are investigated: a variation on the well-known 'vortex-MOT', and the other a novel 'hybrid-MOT' combining Zeeman-shifted and purely optical scattering force components. The beam geometry is obtained similar to the mirror-MOT, using a planar mirror surface but with a different magnetic field geometry more suited to planar systems. Using these techniques, we have trapped around 6 × 106 and 26 × 106 atoms of 85Rb in the vortex-MOT and hybrid-MOT respectively. For the vortex-MOT the atoms are directly cooled well below the Doppler temperature without any additional sub-Doppler cooling stage, whereas the temperature of the hybrid-MOT has been measured slightly above the Doppler temperature limit. In both cases the attained lower temperature ensures the quantum behaviour of the trapped atoms required for the applications of portable quantum sensors and many others.

2045-2322
1-7
Roy, Ritayan
b73b6155-b144-48c3-8eb6-cffe00e385ef
Rushton, Jo
168055b8-1e36-46a4-8244-853e674f0ce8
Dragomir, Andrei
abc39479-5e37-4159-8d14-ac792b9c3f30
Aldous, Matthew
2f1f37e3-6d9a-4cbd-b8c5-fcbf719b35d6
Himsworth, Matt
24e9b896-b4d3-40f7-8047-82a38efa4898
Roy, Ritayan
b73b6155-b144-48c3-8eb6-cffe00e385ef
Rushton, Jo
168055b8-1e36-46a4-8244-853e674f0ce8
Dragomir, Andrei
abc39479-5e37-4159-8d14-ac792b9c3f30
Aldous, Matthew
2f1f37e3-6d9a-4cbd-b8c5-fcbf719b35d6
Himsworth, Matt
24e9b896-b4d3-40f7-8047-82a38efa4898

Roy, Ritayan, Rushton, Jo, Dragomir, Andrei, Aldous, Matthew and Himsworth, Matt (2018) A misaligned magneto-optical trap to enable miniaturized atom chip systems. Scientific Reports, 8 (1), 1-7. (doi:10.1038/s41598-018-28464-0).

Record type: Article

Abstract

We describe the application of displaced, or misaligned, beams in a mirror-based magneto-optical trap (MOT) to enable portable and miniaturized atom chip experiments where optical access is limited to a single window. Two different geometries of beam displacement are investigated: a variation on the well-known 'vortex-MOT', and the other a novel 'hybrid-MOT' combining Zeeman-shifted and purely optical scattering force components. The beam geometry is obtained similar to the mirror-MOT, using a planar mirror surface but with a different magnetic field geometry more suited to planar systems. Using these techniques, we have trapped around 6 × 106 and 26 × 106 atoms of 85Rb in the vortex-MOT and hybrid-MOT respectively. For the vortex-MOT the atoms are directly cooled well below the Doppler temperature without any additional sub-Doppler cooling stage, whereas the temperature of the hybrid-MOT has been measured slightly above the Doppler temperature limit. In both cases the attained lower temperature ensures the quantum behaviour of the trapped atoms required for the applications of portable quantum sensors and many others.

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s41598-018-28464-0 - Version of Record
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More information

Accepted/In Press date: 21 June 2018
e-pub ahead of print date: 4 July 2018
Published date: 1 December 2018

Identifiers

Local EPrints ID: 422352
URI: https://eprints.soton.ac.uk/id/eprint/422352
ISSN: 2045-2322
PURE UUID: 6d2ffc0d-705e-437d-8191-b12cfbc59b57

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Date deposited: 23 Jul 2018 16:30
Last modified: 13 Mar 2019 18:14

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