Observation of broadband time-dependent Rabi shifting in microplasmas.
Observation of broadband time-dependent Rabi shifting in microplasmas.
复制标题
微等离子体中宽带时间依赖性拉比位移的观察。
DOI：
10.1103/physrevlett.103.205001
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发表时间：
2009
影响因子：
8.6
通讯作者：
R. Levis
中科院分区：
文献类型：
--
作者：
R. Compton;A. Filin;D. Romanov;R. Levis
当皮秒探针激光传播通过强泵浦光束焦点中产生的弱电离、电子激发的微等离子体时，可以观察到拉比边带形式的相干宽带辐射。边带是由探针束与中性原子的激发态对通过探针引起的拉比振荡相互作用而产生的。相对于探头载波频率 >90 meV 的边带偏移会导致 200 meV 的有效带宽。边带由探测脉冲的强度和时间分布控制；振幅和位移与时间相关的广义拉比循环模型的预测一致。
Coherent broadband radiation in the form of Rabi sidebands is observed when a ps probe laser propagates through a weakly ionized, electronically excited microplasma generated in the focus of an intense pump beam. The sidebands arise from the interaction of the probe beam with pairs of excited states of a constituent neutral atom via the probe-induced Rabi oscillation. Sideband shifting of >90 meV from the probe carrier frequency results in an effective bandwidth of 200 meV. The sidebands are controlled by the intensity and temporal profile of the probe pulse; with amplitude and shift in agreement with the predictions of a time-dependent generalized Rabi cycling model.