Two-Color Grating Magneto-Optical Trap for Narrow-Line Laser Cooling

verfasst von
S. Bondza, C. Lisdat, S. Kroker, T. Leopold
Abstract

We demonstrate the two-color cooling and trapping of alkaline-earth atoms in a grating magneto-optical trap (GMOT). The trap is formed by a single incident laser beam together with four secondary beams that are generated via diffraction from a nanostructured wafer. A grating structure for a GMOT operating with strontium atoms is optimized and fabricated. We trap 10688Sr atoms on the 1S0→1P1 transition at 461nm and transfer 25% of these atoms to the second cooling stage on the narrower 1S0→3P1 intercombination transition at 689nm, preparing a sample of 2.5×105 atoms at 5μK. These results demonstrate the applicability of the GMOT technology in conjunction with two widely differing wavelengths and enable the continued miniaturization of alkaline-earth-based quantum technologies like optical atomic clocks.

Externe Organisation(en)
Physikalisch-Technische Bundesanstalt (PTB)
DLR-Institut für Satellitengeodäsie und Inertialsensorik
Technische Universität Braunschweig
Laboratory for Emerging Nanometrology Braunschweig (LENA)
Typ
Artikel
Journal
Physical review applied
Band
17
ISSN
2331-7019
Publikationsdatum
01.04.2022
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Physik und Astronomie (insg.)
Elektronische Version(en)
https://doi.org/10.1103/physrevapplied.17.044002 (Zugang: Offen)