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Induced transparency in the XUV: a pump-probe test of laser-cluster interactions

机译：XUV中产生的透明性：激光-群集相互作用的泵浦探针测试

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An experiment is proposed to distinguish between different laser-cluster atomistic models and their predictions. The induced transparency of rare-gas clusters, post-interaction with an extreme ultraviolet (XUV) pump-pulse, is predicted by using an atomistic hybrid quantum-classical molecular dynamics model. We find there is an intensity range for which an XUV probe-pulse has no lasting effect on the average charge state of a cluster after being saturated by an XUV pump-pulse: the cluster is transparent to the probe-pulse. Multiple complete experimental signals are calculated which include the effect of the pulse's spatial distribution as well as the cluster size distribution. The calculated experimental signals and trends are also accomplished with the addition of an ionization potential lowering model that results in effectively removing the induced transparency effect. Thus, the proposed experiment is expected to either find the new phenomenon of induced transparency in clusters or give strong evidence for the existence of the enhanced ionization phenomenon, ionization potential lowering, in nanoplasmas.
机译：提出了一个实验来区分不同的激光簇原子模型及其预测。通过使用原子混合量子经典分子动力学模型，预测了与极紫外（XUV）泵浦脉冲相互作用后的稀有气体簇的透明性。我们发现，在一个强度范围内，XUV探测脉冲在被XUV泵浦脉冲饱和后，对簇的平均电荷状态没有持久影响：该簇对探测脉冲是透明的。计算出多个完整的实验信号，其中包括脉冲的空间分布以及簇大小分布的影响。计算出的实验信号和趋势还可以通过添加电离势降低模型来完成，该模型可有效消除诱导的透明效应。因此，所提出的实验有望发现簇中诱导透明性的新现象，或者为纳米等离子体中存在增强的电离现象，电离电势降低提供强有力的证据。

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