Details
| Original language | English |
|---|---|
| Article number | 023202 |
| Journal | Review of scientific instruments |
| Volume | 93 |
| Issue number | 2 |
| Publication status | Published - 2 Feb 2022 |
Abstract
We exploit red- and blue-detuned magneto-optical trapping (MOT) of 87Rb benefitting from a simplified setup and a novel approach based on liquid crystal variable retarders (LCVR). To maintain the trapping forces when switching from a red- to a blue-detuned MOT, the handedness of the circular polarization of the cooling beams needs to be reversed. LCVRs allow fast polarization control and represent compact, simple, and cost-efficient components, which can easily be implemented in existing laser systems. This way, we achieve a blue-detuned type-II MOT for 8.7 × 108 atoms of 87Rb with sub-Doppler temperatures of 44 μK well below the temperatures reached in a conventional 87Rb type-I MOT. The phase space density is increased by more than two orders of magnitude compared to the standard red-detuned type-I MOT. The setup can readily be transferred to any other systems working with 87Rb.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Instrumentation
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In: Review of scientific instruments, Vol. 93, No. 2, 023202, 02.02.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Red- and blue-detuned magneto-optical trapping with liquid crystal variable retarders
AU - Piest, B.
AU - Vollenkemper, V.
AU - Böhm, J.
AU - Herbst, A.
AU - Rasel, E. M.
N1 - Funding Information: This work was supported by the DLR Space Administration with funds provided by the Federal Ministry for Economic Affairs and Energy (BMWi) under Grant No. DLR 50WP1431 and was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy—EXC-2123 QuantumFrontiers—390837967.
PY - 2022/2/2
Y1 - 2022/2/2
N2 - We exploit red- and blue-detuned magneto-optical trapping (MOT) of 87Rb benefitting from a simplified setup and a novel approach based on liquid crystal variable retarders (LCVR). To maintain the trapping forces when switching from a red- to a blue-detuned MOT, the handedness of the circular polarization of the cooling beams needs to be reversed. LCVRs allow fast polarization control and represent compact, simple, and cost-efficient components, which can easily be implemented in existing laser systems. This way, we achieve a blue-detuned type-II MOT for 8.7 × 108 atoms of 87Rb with sub-Doppler temperatures of 44 μK well below the temperatures reached in a conventional 87Rb type-I MOT. The phase space density is increased by more than two orders of magnitude compared to the standard red-detuned type-I MOT. The setup can readily be transferred to any other systems working with 87Rb.
AB - We exploit red- and blue-detuned magneto-optical trapping (MOT) of 87Rb benefitting from a simplified setup and a novel approach based on liquid crystal variable retarders (LCVR). To maintain the trapping forces when switching from a red- to a blue-detuned MOT, the handedness of the circular polarization of the cooling beams needs to be reversed. LCVRs allow fast polarization control and represent compact, simple, and cost-efficient components, which can easily be implemented in existing laser systems. This way, we achieve a blue-detuned type-II MOT for 8.7 × 108 atoms of 87Rb with sub-Doppler temperatures of 44 μK well below the temperatures reached in a conventional 87Rb type-I MOT. The phase space density is increased by more than two orders of magnitude compared to the standard red-detuned type-I MOT. The setup can readily be transferred to any other systems working with 87Rb.
UR - http://www.scopus.com/inward/record.url?scp=85124420312&partnerID=8YFLogxK
U2 - 10.1063/5.0071619
DO - 10.1063/5.0071619
M3 - Article
VL - 93
JO - Review of scientific instruments
JF - Review of scientific instruments
SN - 0034-6748
IS - 2
M1 - 023202
ER -