Proposal for Observing XUV-Induced Rabi Oscillation Using Superfluorescent Emission.
Proposal for Observing XUV-Induced Rabi Oscillation Using Superfluorescent Emission.
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DOI：
10.1103/physrevlett.131.043201
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发表时间：
2023-07
影响因子：
8.6
通讯作者：
Juntao Cui;Yongjun Cheng;Xin Wang;Zheng Li;N. Rohringer;V. Kimberg;S. Zhang
中科院分区：
文献类型：
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作者：
Juntao Cui;Yongjun Cheng;Xin Wang;Zheng Li;N. Rohringer;V. Kimberg;S. Zhang
强X射线和极紫外（XUV）光源已经出现了几十年，然而，由于XUV光子能量范围内的弱非线性相互作用，观察XUV脉冲引起的拉比振荡仍然是一项非常具有挑战性的实验任务。在这里，我们提出了一种方案，其中强烈的 XUV 泵浦脉冲对 He 介质进行光电离，然后在 He^{+}(1s-3p) 跃迁处发生强烈的粒子数反转和拉比振荡，并伴随着 He^{+}(3p-2s) 跃迁处的 7.56 eV 脉冲的超荧光 (SF)。我们的数值模拟表明，由光子能量为 48.36 eV 的 XUV 脉冲引起的 He^{+}(1s-3p) 跃迁处的拉比振荡在 SF 光谱中产生显着的特征，使我们能够识别和表征 XUV 引起的拉比振荡状态。该方案提供了一种灵敏的工具来监测和控制强 XUV 触发的原子和分子中的超快非线性动力学。
Intense x-ray and extreme ultraviolet (XUV) light sources have been available for decades, however, due to weak nonlinear interaction in the XUV photon energy range, observation of Rabi oscillation induced by XUV pulse remains a very challenging experimental task. Here we suggest a scheme where photoionization of a He medium by an intense XUV pump pulse is followed by a strong population inversion and Rabi oscillation at the He^{+}(1s-3p) transition and is accompanied by superfluorescence (SF) of the 7.56 eV pulse at the He^{+}(3p-2s) transition. Our numerical simulations show that the Rabi oscillation at the He^{+}(1s-3p) transition induced by an XUV pulse with photon energy 48.36 eV results in significant signatures in the SF spectra, allowing us to identify and characterize the XUV induced Rabi-oscillatory regime. The proposed scheme provides a sensitive tool to monitor and control ultrafast nonlinear dynamics in atoms and molecules triggered by intense XUV.