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标题：Highly efficient four-wave mixing in double-Λ system in ultraslow propagation regime
来源：《物理评论A》2005年70卷5期 文章号053818
作者：激光技术国家重点实验室、华中科技大学物理系、中科院冷原子物理中心 Ying Wu（吴颖）
激光技术国家重点实验室、华中科技大学物理系 Xiao-Xue Yang（杨晓雪）
Research Fronts: HIGHLY EFFICIENT FOUR-WAVE MIXING; MULTIPARTY ENTANGLED STATES USING PAIRWISE PERFECTLY EFFICIENT SINGLE-PROBE PHOTON FOUR-WAVE MIXING; OPENING OPTICAL FOUR-WAVE MIXING CHANNELS; ULTRASLOW MIXING; TWO-COLOR ULTRASLOW OPTICAL SOLITONS
领域：物理
摘要：We perform a time-dependent analysis of four-wave mixing (FWM) in a double- Λ 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 (Vg∕c∼10−4–10−5) 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.
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