1.Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, China; 2.Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, China; Laboratoire de Photonique Quantique et Moleulaire, UMR CNRS 8537, ENS Cachan, 61 avenue du Preident Wilson, 94235 Cachan Cedex, France; 3.Laboratoire de Photonique Quantique et Moleulaire, UMR CNRS 8537, ENS Cachan, 61 avenue du Preident Wilson, 94235 Cachan Cedex, France
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