1.
Rev Sci Instrum
; 91(10): 103202, 2020 Oct 01.
Artículo
en Inglés
| MEDLINE
| ID: mdl-33138581
RESUMEN
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 1S0 â 1P1 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 × 106 88Sr atoms at a temperature of â¼6 mK, and with a trap lifetime of â¼1 s. Our results will aid the effort to miniaturize quantum technologies based on alkaline-earth atoms.