signature=4342c60cb05d3d71092b87291ce49b64,Strong-field above-threshold ionization in laser-irradiat...

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于 2021-05-30 09:27:26 发布

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文章标签： signature=4342c60cb05d3d71092b87291ce49b64

该理论研究探讨了激光照射下碳富勒烯C60分子的强场多光子阈上电离(ATI)现象。通过速度表象的分子强场近似(SFA)结合密度泛函理论(DFT)计算初始分子状态，计算结果显示C60的光电子能谱中存在两个清晰分离的干涉极小值，分别出现在低能和高能区域，这是由于内部多个原子中心的强场电离产生的量子干涉破坏效应。

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摘要：

We report about the results of our theoretical study of strong-field (multiphoton) above-threshold ionization (ATI) in laser-irradiated carbon fullerene molecule Cunder condition of relevant experiment. The problem is addressed within the velocity-gauge (VG) formulation of molecular strong-field approximation (SFA) essentially exploiting the density-functional-theory (DFT) method for numerical composition of initial (laser-free) molecular state using the routines of GAUSSIAN-03 code. The results of our present VG-SFA calculation for Cphotoelectron energy spectra (PES) demonstrate two distinct (well-separated) and pronounced local interference minima - in the low-energy and the high-energy domains of produced PES - both arising due to destructive intramolecular (multislit) quantum interference of strong-field ionization corresponding to photoelectron emission from multiple separate atomic centers.

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