High-order harmonic generation in the water window from mid-IR laser sources
High-order harmonic generation in the water window from mid-IR laser sources
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DOI：
10.1103/physreva.106.063113
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发表时间：
2021-01
影响因子：
2.9
通讯作者：
K. Finger;D. Atri-Schuller;N. Douguet;K. Bartschat;K. Hamilton
中科院分区：
文献类型：
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作者：
K. Finger;D. Atri-Schuller;N. Douguet;K. Bartschat;K. Hamilton
研究了氖原子对中红外激光场（2000 ~ 3000 nm）的谐波响应，采用单活性电子（SAE）模型和全从头算全电子R矩阵（RMT）方法。通过改变激光峰值强度和波长，找到适合水窗高谐波成像的参数。SAE和RMT结果的比较表明，两者在质量上是一致的，经典三步模型预测的截止频率等参数也是一致的。然而，在细节上存在显著差异，特别是在预测的转换效率方面。这些细节表明了多电子效应可能的重要性，以及对数值模型特定方面的定量预测的高度敏感性。
We investigate the harmonic response of neon atoms to mid-IR laser fields (2000 − 3000 nm) using a single-active electron (SAE) model and the fully ab initio all-electron R -Matrix with Time-dependence (RMT) method. The laser peak intensity and wavelength are varied to find suitable parameters for high-harmonic imaging in the water window. Comparison of the SAE and RMT results shows qualitative agreement between them as well as parameters such as the cutoff frequency predicted by the classical three-step model. However, there are significant differences in the details, particularly in the predicted conversion efficiency. These details indicate the possible importance of multi-electron effects, as well as a strong sensitivity of quantitative predictions on specific aspects of the numerical model.