High Refractive Index without Absorption in a Ladder-Type System
ZENG Zhi-Qiang1,2** , HOU Bang-Pin3** , LIU Fu-Ti1 , SHAO Ju-Xiang2
1 School of Physics and Electronic Engineering, Yibin University, Yibin 6440002 Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 6440003 School of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610066
Abstract ：A three-level ladder-type system with vacuum-induced coherence and incoherent pumping is studied to obtain a high refractive index without absorption. It is shown that the enhancement of the refractive index without absorption can be accomplished by choosing the proper values of the incoherent pumping, the angle between the two dipole moments, the probe detuning and the relative phase of the two coherent fields.
收稿日期: 2013-10-04
出版日期: 2014-02-28
:
42.50.Gy
(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
42.50.Hz
(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
42.50.-p
(Quantum optics)
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2014, Vol. 31 
