Red- and blue-detuned magneto-optical trapping with liquid crystal variable retarders

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autorschaft

  • B. Piest
  • V. Vollenkemper
  • J. Böhm
  • A. Herbst
  • E. M. Rasel
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Details

OriginalspracheEnglisch
Aufsatznummer023202
FachzeitschriftReview of scientific instruments
Jahrgang93
Ausgabenummer2
PublikationsstatusVeröffentlicht - 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 Sachgebiete

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Red- and blue-detuned magneto-optical trapping with liquid crystal variable retarders. / Piest, B.; Vollenkemper, V.; Böhm, J. et al.
in: Review of scientific instruments, Jahrgang 93, Nr. 2, 023202, 02.02.2022.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Piest, B., Vollenkemper, V., Böhm, J., Herbst, A., & Rasel, E. M. (2022). Red- and blue-detuned magneto-optical trapping with liquid crystal variable retarders. Review of scientific instruments, 93(2), Artikel 023202. https://doi.org/10.1063/5.0071619
Piest B, Vollenkemper V, Böhm J, Herbst A, Rasel EM. Red- and blue-detuned magneto-optical trapping with liquid crystal variable retarders. Review of scientific instruments. 2022 Feb 2;93(2):023202. doi: 10.1063/5.0071619
Piest, B. ; Vollenkemper, V. ; Böhm, J. et al. / Red- and blue-detuned magneto-optical trapping with liquid crystal variable retarders. in: Review of scientific instruments. 2022 ; Jahrgang 93, Nr. 2.
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title = "Red- and blue-detuned magneto-optical trapping with liquid crystal variable retarders",
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.",
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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.

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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.

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