Effect of the upper-level decay on the resonantly enhanced four-wave mixing in a modified double- Λ system
Effect of the upper-level decay on the resonantly enhanced four-wave mixing in a modified double- Λ system
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DOI：
10.1103/physreva.69.043811
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发表时间：
2004-04
影响因子：
2.9
通讯作者：
F. Kien;K. Hakuta
中科院分区：
文献类型：
--
作者：
F. Kien;K. Hakuta
我们研究了具有改进的双 {lambda} 能级配置的原子介质中的连续共振四波混频。在一对能级的远离共振条件下，我们将五能级方案简化为有效的三能级方案，在两个较低能级之间具有双光子耦合。我们推导了简化格式的密度矩阵方程的精确稳态解，并获得了连续波状态下场的混波方程。我们表明，上层衰减可能会极大地影响共振增强波混合过程。我们证明这种衰减会缩短而不是延长转换周期。
We study the continuous resonant four-wave mixing in a medium of atoms with a modified double-{lambda} level configuration. Under the far-off-resonance condition for a pair of levels, we reduce the five-level scheme to an effective three-level scheme, with a two-photon coupling between the two lower levels. We derive the exact steady-state solution to the density-matrix equations for the reduced scheme and obtain the wave-mixing equations for the fields in the continuous-wave regime. We show that the upper-level decay may substantially affect the resonantly enhanced wave-mixing process. We demonstrate that this decay shortens the conversion cycle rather than prolongs it.