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Confinement of an alkaline-earth element in a grating magneto-optical trap

TitleConfinement of an alkaline-earth element in a grating magneto-optical trap
Publication TypeJournal Article
Year of Publication2020
AuthorsA.. Sitaram, P.. K. Elgee, G.. K. Campbell, N.. N. Klimov, S.. Eckel, and D.. S. Barker
JournalRev. Sci. Instrum.
Volume91
Pagination103202
Date PublishedOCT 1
Type of ArticleArticle
ISSN0034-6748
Abstract

We demonstrate a compact magneto-optical trap (MOT) of alkaline-earth atoms using a nanofabricated diffraction grating chip. A single input laser beam, resonant with the broad S-1(0) -> P-1(1) transition of strontium, forms the MOT in combination with three diffracted beams from the grating chip and a magnetic field produced by permanent magnets. A differential pumping tube limits the effect of the heated, effusive source on the background pressure in the trapping region. The system has a total volume of around 2.4 l. With our setup, we have trapped up to 5 x 10(6) Sr-88 atoms at a temperature of similar to 6 mK, and with a trap lifetime of similar to 1 s. Our results will aid the effort to miniaturize quantum technologies based on alkaline-earth atoms.

DOI10.1063/5.0019551