Chin. Phys. Lett.  2008, Vol. 25 Issue (6): 2041-2044    DOI:
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Absorption Changes Induced by Off-Resonance Driving a Degenerate Two-Level System
CAI Jin;ZHOU Hai-Tao;WANG Wen-Qi;LI Zhong-Hua;LI Tao;ZHANG Jun-Xiang
The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006
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CAI Jin, ZHOU Hai-Tao, WANG Wen-Qi et al  2008 Chin. Phys. Lett. 25 2041-2044
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Abstract The alteration of atomic absorption via quantum coherence is observed in the degenerate two-level atomic system. It is shown that when the detuning of coupling field equals to that of probe light, i.e. two-photon resonance, the reduction of atomic absorption via electromagnetically induced transparency
occurs. However, when we tune the coupling field to two-photon off-resonance, the enhancement of absorption is obtained for the probe field. The influences of one-photon detuning and intensity of coupling field on absorption are also experimentally demonstrated.
Keywords: 42.50.Gy      32.80.Qk     
Received: 03 March 2008      Published: 31 May 2008
PACS:  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/       OR      https://cpl.iphy.ac.cn/Y2008/V25/I6/02041
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CAI Jin
ZHOU Hai-Tao
WANG Wen-Qi
LI Zhong-Hua
LI Tao
ZHANG Jun-Xiang
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