Number-resolved imaging of $^{88}$Sr atoms in a long working distance optical tweezer
Niamh Christina Jackson, Ryan Keith Hanley, Matthew Hill, Frédéric Leroux, Charles S. Adams, Matthew Philip Austin Jones
SciPost Phys. 8, 038 (2020) · published 10 March 2020
- doi: 10.21468/SciPostPhys.8.3.038
- Submissions/Reports
Abstract
We demonstrate number-resolved detection of individual strontium atoms in a long working distance low numerical aperture (NA = 0.26) tweezer. Using a camera based on single-photon counting technology, we determine the presence of an atom in the tweezer with a fidelity of 0.989(6) (and loss of 0.13(5)) within a 200 $\mu$s imaging time. Adding continuous narrow-line Sisyphus cooling yields similar fidelity, at the expense of much longer imaging times (30 ms). Under these conditions we determine whether the tweezer contains zero, one or two atoms, with a fidelity $>$0.8 in all cases with the high readout speed of the camera enabling real-time monitoring of the number of trapped atoms. Lastly we show that the fidelity can be further improved by using a pulsed cooling/imaging scheme that reduces the effect of camera dark noise.
Cited by 11
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 Niamh Jackson,
- 1 2 Ryan Hanley,
- 1 Matthew Hill,
- 1 Frédéric Leroux,
- 1 Charles Adams,
- 1 Matthew Jones
- Engineering and Physical Sciences Research Council [EPSRC]
- Horizon 2020 (through Organization: European Commission [EC])