Number-resolved imaging of $^{88}$Sr atoms in a long working distance optical tweezer
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...
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Published in | SciPost physics Vol. 8; no. 3; p. 038 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
SciPost
01.03.2020
|
Online Access | Get full text |
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Summary: | 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
\bm{200\ \upmu}
200
μ
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
\bm{>0.8}
>
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. |
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ISSN: | 2542-4653 2542-4653 |
DOI: | 10.21468/SciPostPhys.8.3.038 |