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Analysis of atom detection via magnetic optical effect |
| Cheng Feng (程峰), Jiang Xiao-Jun (蒋小军), Han Jing-Shan (韩景珊), Lin Jin-Da (林锦达), Wang Yu-Zhu (王育竹) |
| The Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China Center for Cold Atom Physics, Chinese Academy of Sciences, Shanghai 201800, China |
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Abstract We demonstrated a new method of atom detection by means of magnetic optical effect. The number density of the atom cloud was measured by detecting the rotation angle of the polarization plane of linearly polarized probe light when propagating inside the atomic cloud. Detuning, magnetic field, and light intensity dependencies of the rotation angle were studied theoretically and experimentally to find the best parameter for atom detection. In this way, we managed to achieve a rotation angle of 0.22 rad with a signal to noise ratio (SNR) of 75 and a contrast of 87.5%.
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Received: 16 April 2012
Revised: 05 July 2012
Accepted manuscript online:
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PACS:
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32.30.-r
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(Atomic spectra?)
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32.60.+i
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(Zeeman and Stark effects)
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32.70.-n
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(Intensities and shapes of atomic spectral lines)
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CB921504) and the National Natural Science Foundation of China (Grant No. 10974210). |
Corresponding Authors:
Wang Yu-Zhu
E-mail: yzwang@mail.shcnc.ac.cn
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Cite this article:
Cheng Feng (程峰), Jiang Xiao-Jun (蒋小军), Han Jing-Shan (韩景珊), Lin Jin-Da (林锦达), Wang Yu-Zhu (王育竹) Analysis of atom detection via magnetic optical effect 2013 Chin. Phys. B 22 013201
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