Chin. Phys. Lett.  2015, Vol. 32 Issue (06): 064211    DOI: 10.1088/0256-307X/32/6/064211
FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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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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.
Received: 24 March 2015      Published: 30 June 2015
PACS:  42.25.Bs (Wave propagation, transmission and absorption)  
  42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)  
  32.80.Qk (Coherent control of atomic interactions with photons)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/32/6/064211       OR      https://cpl.iphy.ac.cn/Y2015/V32/I06/064211
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ZHANG Jun
GU Zhen-Jie
QIAN Peng
HAN Zhi-Guang
CHEN Jie-Fei
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