| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Cold Atom Cloud with High Optical Depth Measured with Large Duty Cycle |
| ZHANG Jun, GU Zhen-Jie, QIAN Peng, HAN Zhi-Guang, CHEN Jie-Fei** |
Department of Physics, East China Normal University, Shanghai 200062
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| Cite this article: |
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ZHANG Jun, GU Zhen-Jie, QIAN Peng et al 2015 Chin. Phys. Lett. 32 064211 |
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Abstract We present a cold atom system with a dark-line two-dimensional magneto-optical trap, to increase the atomic density by suppressing the atomic radiation pressure. Optical depth (OD) and duty cycle are used to evaluate the system performance. We demonstrate a 100% increase in OD with the dark line, and obtain an ultrahigh OD of 264 with 10% for the duty cycle. Also, with an efficient dark line region, the OD could maintain above 100 with duty cycle as high as 30%. The cold atomic ensemble with an ultrahigh OD with a 10%–30% duty cycle is particularly advantageous in quantum information processing and communication.
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Received: 24 March 2015
Published: 30 June 2015
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| PACS: |
42.25.Bs
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(Wave propagation, transmission and absorption)
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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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32.80.Qk
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(Coherent control of atomic interactions with photons)
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