Influence of Laser Intensity Fluctuation on Single-Cesium Atom Trapping
Lifetime in a 1064-nm Microscopic Optical Tweezer
- URL: http://arxiv.org/abs/2003.08415v1
- Date: Wed, 18 Mar 2020 18:03:24 GMT
- Title: Influence of Laser Intensity Fluctuation on Single-Cesium Atom Trapping
Lifetime in a 1064-nm Microscopic Optical Tweezer
- Authors: Rui Sun, Xin Wang, Kong Zhang, Jun He and Junmin Wang
- Abstract summary: An optical tweezer composed of a strongly focused single-spatial-mode Gaussian beam of a red-detuned 1064-nm laser can confine a single-cesium atom at the strongest point of the light intensity.
We can use this for coherent manipulation of single-quantum bits and single-photon sources.
- Score: 12.500890360796818
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: An optical tweezer composed of a strongly focused single-spatial-mode
Gaussian beam of a red-detuned 1064-nm laser can confine a single-cesium (Cs)
atom at the strongest point of the light intensity. We can use this for
coherent manipulation of single-quantum bits and single-photon sources. The
trapping lifetime of the atoms in the optical tweezers is very short due to the
impact of the background atoms, the laser intensity fluctuation of optical
tweezer and the residual thermal motion of the atoms. In this paper, we
analyzed the influence of the background pressure, the trap frequency of
optical tweezers and the parametric heating of the optical tweezer on the
atomic trapping lifetime. Combined with the external feedback loop based on an
acousto-optical modulator (AOM), the intensity fluctuation of the 1064-nm laser
in the time domain was suppressed from $\pm$ 3.360$\%$ to $\pm$ 0.064$\%$, and
the suppression bandwidth reached approximately 33 kHz. The trapping lifetime
of a single Cs atom in the microscopic optical tweezer was extended from 4.04 s
to 6.34 s.
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