Strong-field ionization of asymmetric triatomic model molecules by few-cycle circularly polarized laser pulses

Strong-field ionization of asymmetric triatomic model molecules by few-cycle circularly polarized laser pulses
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少周期圆偏振激光脉冲对不对称三原子模型分子的强场电离

DOI:
10.1080/09500340.2017.1299883
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发表时间:
2017
影响因子:
1.3
通讯作者:
S. Gräfe
S. Gräfe
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
M. Paul;L. Yue;S. Gräfe

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我们建立了一个数值模拟系统,模拟了三个电荷可调的正三角形原子核环境中的单个活跃电子。这使得能够模拟对称和不对称的核电荷配置,同时保持电离势固定。我们研究了这些模型系统与强烈的,几个周期,圆偏振红外激光脉冲的相互作用,并检查由左,右圆偏振场引起的光电子谱之间的不对称性。我们表明,这些不对称性的影响,核电荷配置的初始对称性。我们证明,几个周期的激光脉冲可以诱导一个额外的不对称性的光电子谱,这可以削弱或增强的不对称性印记的初始对称性的模型系统。
We have developed a numerical model system for a single active electron in an environment of three nuclei with tunable charges arranged as an equilateral triangle. This enables mimicking of both symmetric and asymmetric nuclear charge configurations, while keeping the ionization potential fixed. We investigate the interaction of these model systems with intense, few-cycle, circularly polarized infrared laser pulses and examine the asymmetries between the photoelectron spectra induced by the left- and right-circularly polarized fields. We show that these asymmetries are influenced by the initial symmetry of nuclear charge configurations. We demonstrate that few-cycle laser pulses can induce an additional asymmetry in the photoelectron spectra, which can weaken or enhance the asymmetry imprinted by the initial symmetry properties of the model system.
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