We propose a modified version for the strong field theory of high-order harmonic generation (HHG) in molecules and we apply it to analyze the orientation-dependences of HHG from the hydrogen molecule and it molecular ion H 2 + when exposed to linearly polarized laser light. Our model predicts the presence of clear interference minima in the spectra of the high-order harmonics. We further exploit the orientation-dependence of the interference minima’s position and the harmonics polarization properties through proposed model. We found that the position of the interference minima are associated with the polarization properties of harmonics.

中文翻译：

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H 2和H 2 +分子中高次谐波产生的取向依赖性

我们提出了分子中高阶谐波产生（HHG）的强场理论的改进版本，并将其应用于分析氢分子与氢离子及其暴露于线性偏振激光时分子离子H 2 +的方向依赖性光。我们的模型预测高次谐波频谱中存在明显的最小干扰。通过提出的模型，我们进一步利用了极小值干扰的位置和谐波极化特性的方向依赖性。我们发现干扰最小值的位置与谐波的极化特性相关。