In recent experiments [e.g., Nature Physics 2 （2006） 332], the enhanced light deflection in an atomic ensemble due to inhomogeneous fields is demonstrated by the electromagneticaJly induced transparency （EIT） base...In recent experiments [e.g., Nature Physics 2 （2006） 332], the enhanced light deflection in an atomic ensemble due to inhomogeneous fields is demonstrated by the electromagneticaJly induced transparency （EIT） based mechanism. In this paper, we explore a different mechanism for the similar phenomenon of the enhanced light deflection. This mechanism is based on the coherent population oscillation, which leads to the hole burning in the absorption spectrum. The medium causing the deflection of probe light is an ensemble of two-level atoms manipulated by a strong controlled field on the two photon resonances. In the large detuning condition, the response of the medium to the pump field and signal field is obtained with steady state approximation. And it is found that after the probe field travels across the medium, the signal ray bends due to the spatial-dependent profile of the control beam.展开更多
基金Supported by the scientific and Technologicl Research and Development Program of Ningxia Province(No.[2008]222-1)the Scientific and Research Project of Colleges and Universities of Ningxia Province(No.[2008]192-81)the Key Scientific and Research Project of Ningixa Teachers University(ZD08006).
基金The project supported by the Natural Science Foundation of China under Grant Nos. 10775048, 10704023, 10775048, and 10325523the National Fundamental Research Program of China under Grant No. 2007CB925204the Scientific Research Fund of Hunan Provincial Education Department of China under Grant No. 07C579
文摘In recent experiments [e.g., Nature Physics 2 （2006） 332], the enhanced light deflection in an atomic ensemble due to inhomogeneous fields is demonstrated by the electromagneticaJly induced transparency （EIT） based mechanism. In this paper, we explore a different mechanism for the similar phenomenon of the enhanced light deflection. This mechanism is based on the coherent population oscillation, which leads to the hole burning in the absorption spectrum. The medium causing the deflection of probe light is an ensemble of two-level atoms manipulated by a strong controlled field on the two photon resonances. In the large detuning condition, the response of the medium to the pump field and signal field is obtained with steady state approximation. And it is found that after the probe field travels across the medium, the signal ray bends due to the spatial-dependent profile of the control beam.
