Highly efficient four-wave mixing in double-A system in ultraslow propagation regime (5 pages)
Highly efficient four-wave mixing in double-A system in ultraslow propagation regime (5 pages)
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DOI：
10.1103/physreva.70.053818
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发表时间：
2004-11
影响因子：
2.9
通讯作者：
Ying Wu;Xiao-xue Yang
中科院分区：
文献类型：
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作者：
Ying Wu;Xiao-xue Yang
我们对超低传播条件下双{lambda}系统中的四波混频（FWM）进行了时间相关分析，得到了脉冲探测激光、FWM产生的脉冲、相移和吸收系数、群速度和FWM效率的解析表达式。利用这些解析表达式，我们证明了有效产生的FWM场可以获得与探测泵浦相同的超低群速度（V{sub g}/c{约}10{sup -4}-10{sup -5}）和脉冲形状，并且最大FWM效率大于25%，比以往的FWM方案在超低传播域中提高了几个数量级。
We perform a time-dependent analysis of four-wave mixing (FWM) in a double-{lambda} system in an ultraslow-propagation regime and obtain the analytical expressions of pulsed probe laser, FWM-generated pulse, phase shifts and absorption coefficients, group velocities, and FWM efficiency. With these analytical expressions, we show that an efficiently generated FWM field can acquire the same ultraslow group velocity (V{sub g}/c{approx}10{sup -4}-10{sup -5}) and pulse shape of a probe pump and that the maximum FWM efficiency is greater than 25%, which is orders of magnitude larger than previous FWM schemes in the ultraslow-propagation regime.