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Achromatic, planar Fresnel-reflector for a single-beam magneto-optical trap

Bondza, S. A. ; Leopold, T. ; Schwarz, R. ; Lisdat, C.

Review of scientific instruments, 2024-01, Vol.95 (1) [Periódico revisado por pares]

United States: American Institute of Physics

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  • Título:
    Achromatic, planar Fresnel-reflector for a single-beam magneto-optical trap
  • Autor: Bondza, S. A. ; Leopold, T. ; Schwarz, R. ; Lisdat, C.
  • Assuntos: Beam steering ; Chromaticity ; Cooling ; Fresnel lenses ; Fresnel reflectors ; Gratings (spectra) ; Miniaturization ; Optical trapping ; Optical traps ; Planar structures ; Strontium isotopes
  • É parte de: Review of scientific instruments, 2024-01, Vol.95 (1)
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: We present a novel achromatic, planar, periodic mirror structure for single-beam magneto-optical trapping and demonstrate its use in the first- and second-stage cooling and trapping for different isotopes of strontium. We refer to it as a Fresnel magneto-optical trap (MOT) as the structure is inspired by Fresnel lenses. By design, it avoids many of the problems that arise for multi-color cooling using planar structures based on diffraction gratings, which have been the dominant planar structures to be used for single-beam trapping thus far. In addition to a complex design process and cost-intensive fabrication, diffraction gratings suffer from their inherent chromaticity, which causes different axial displacements of trap volumes for different wavelengths and necessitates trade-offs in their diffraction properties and achievable trap depths. In contrast, the Fresnel-reflector structure presented here is a versatile, easy-to-manufacture device that combines achromatic beam steering with the advantages of a planar architecture. It enables miniaturizing trapping systems for alkaline-earth-like atoms with multiple cooling transitions as well as multi-species trapping in the ideal tetrahedral configuration and within the same volume above the structure. Our design presents a novel approach for the miniaturization of cold-atom systems based on single-beam MOTs and enables the widespread adoption of these systems.
  • Editor: United States: American Institute of Physics
  • Idioma: Inglês
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