Analysis of atom detection via magnetic optical effect |
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Authors: | Cheng Feng Jiang Xiao-Jun Han Jing-Shan Lin Jin-Da Wang Yu-Zhu |
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Institution: | 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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Keywords: | atom detection magnetic optical effect Faraday rotation |
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