Autoionizing Polaritons in Attosecond Atomic Ionization
Autoionizing Polaritons in Attosecond Atomic Ionization
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阿秒原子电离中的自电离极化子
DOI：
10.1103/physrevlett.127.023202
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发表时间：
2021
影响因子：
8.6
通讯作者：
Sandhu, A.
中科院分区：
文献类型：
--
作者：
Harkema, N.;Cariker, C.;Lindroth, E.;Argenti, L.;Sandhu, A.
激光修饰原子的光致电离谱中普遍存在光生态和耦合态的Autler-Townes分裂。然而，亚稳态奥特勒-汤斯多重态的光-物质纠缠特性使它们成为自电离极化激元，这在很大程度上还没有被探索。我们利用氩原子的阿秒瞬态吸收光谱研究了光诱导态和几种光诱导态之间极化激元多重态的形成。我们测量了一个可控的稳定的极化激元对电离，在良好的协议与从头算理论。使用扩展的Jaynes-Cummings模型的自电离状态，我们表明，这种稳定是由于俄歇衰变和辐射电离的极化分量之间的破坏性干扰。这些结果提供了新的见解的光学控制的电子结构在连续和解锁的门辐射稳定的亚稳多电子系统的应用。
Light-induced states and Autler-Townes splitting of laser-coupled states are common features in the photoionization spectra of laser-dressed atoms. The entangled light-matter character of metastable Autler-Townes multiplets, which makes them autoionizing polaritons, however, is still largely unexplored. We employ attosecond transient-absorption spectroscopy in argon to study the formation of polariton multiplets between theand several light-induced states. We measure a controllable stabilization of the polaritons against ionization, in excellent agreement withab initiotheory. Using an extension of the Jaynes-Cummings model to autoionizing states, we show that this stabilization is due to the destructive interference between the Auger decay and the radiative ionization of the polaritonic components. These results give new insights into the optical control of electronic structure in the continuum and unlock the door to applications of radiative stabilization in metastable polyelectronic systems.