| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Experimental Generation of Narrow-Band Paired Photons: from Damped Rabi Oscillation to Group Delay |
| LIAO Kai-Yu1, YAN Hui1**, HE Jun-Yu1, HUANG Wei1, ZHANG Zhi-Ming2, ZHU Shi-Liang1** |
1Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006
2Laboratory of Quantum Engineering and Quantum Materials, School of Information and Photoelectronic Science and Engineering, South China Normal University, Guangzhou 510006
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| Cite this article: |
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LIAO Kai-Yu, YAN Hui, HE Jun-Yu et al 2014 Chin. Phys. Lett. 31 034205 |
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Abstract We report the experimental generation of narrow-band paired photons through electromagnetically induced transparency and spontaneous four-wave mixing in a two-dimensional magneto-optical trap (2D MOT). By controlling the optical depth of the 2D MOT from 0 to 40, the temporal length of the generated narrow-band paired photons can be varied from 50 to 900 ns. The 'transition' between damped Rabi oscillation and group delay is observed undisputedly. In the damped Rabi oscillation regime, a violation factor of the Cauchy–Schwartz inequality as large as 6642 is observed. In the group delay regime, sub-MHz linewidth (～0.65 MHz) paired photons are obtained with a generation rate of about 0.8×105 s?1.
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Received: 16 September 2013
Published: 28 February 2014
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| PACS: |
42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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42.50.Dv
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(Quantum state engineering and measurements)
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32.80.-t
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(Photoionization and excitation)
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