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首页> 外文期刊>Chinese physics letters >Double-exponentially decayed photoionization in CREI effect: Numerical experiment on 3D H-2(+)
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Double-exponentially decayed photoionization in CREI effect: Numerical experiment on 3D H-2(+)

机译：CREI效应中双指数衰减的光电离：3D H-2（+）的数值实验

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摘要

On the platform of the 3D H-2(+) system, we perform a numerical simulation of its photoionization rate under excitation of weak to intense laser intensities with varying pulse durations and wavelengths. A novel method is proposed for calculating the photoionization rate: a double exponential decay of ionization probability is best suited for fitting this rate. Confirmation of the well-documented charge-resonance-enhanced ionization (CREI) effect at medium laser intensity and Ending of ionization saturation at high light intensity corroborate the robustness of the suggested double-exponential decay process. Surveying the spatial and temporal variations of electron wavefunctions uncovers a mechanism for the double-exponentially decayed photoionization probability as onset of electron ionization along extra degree of freedom. Henceforth, the new method makes clear the origins of peak features in photoionization rate versus internuclear separation. It is believed that this multi-exponentially decayed ionization mechanism is applicable to systems with more degrees of motion.
机译：在3D H-2（+）系统的平台上，我们对从弱到强的激光强度（具有不同的脉冲持续时间和波长）进行激发下，对其光电离速率进行了数值模拟。提出了一种计算光电离速率的新方法：电离概率的双指数衰减最适合于该速率。在中等激光强度下证实了有据可查的电荷共振增强电离（CREI）效应，以及在高光强度下结束电离饱和，证实了所建议的双指数衰减过程的稳健性。通过调查电子波函数的时空变化，可以发现随着电子自由度的增加，双倍衰减的光电离概率的机理。从今以后，新方法将光电离速率与核间分离中峰特征的起源弄清楚。可以相信，这种多指数衰减的电离机制适用于运动程度更高的系统。

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