【摘 要】
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Electromagnctically induced absorption (EIA) [1] is a quantum optical effect that leads to a substantial enhancement of the absorption rate of the probe field b
【机 构】
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InstituteofOptoelectronicSciences,TaiwanOceanUniversity,Keelung,Taiwan202
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Electromagnctically induced absorption (EIA) [1] is a quantum optical effect that leads to a substantial enhancement of the absorption rate of the probe field by the presence of a coupling field.EIA occurs in a degenerate two-level system with Fe =Fg + 1, where Fg and Fe are the total angular momentum of the ground and excited levels, respectively.EIA is caused by the transfer of coherence (TOC) between the excited and ground levels via spontaneous decay, which can only take place for systems with Fe =Fg + 1.But surprisingly, EIA were observed in systems with Fe =Fg-1 and Fe =Fg [2].This type of EIA, which cannot be explained by TOC, was called anomalous EIA.
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