Accurate prediction of interference minima in linear molecular harmonic spectra by a modified two-center model

作者：Cui, Xin; Zhang, Di-Yu; Chen, Gao; Chen, Ji-Gen; Zeng, Si-Liang; Guo, Fu-Ming^*; Yang, Yu-Jun

来源：Chinese Physics B, 2016, 25(3): 033205.

DOI：10.1088/1674-1056/25/3/033205

• high-order harmonic generation
• molecular harmonics

We demonstrate that the interference minima in the linear molecular harmonic spectra can be accurately predicted by a modified two-center model. Based on systematically investigating the interference minima in the linear molecular harmonic spectra by the strong-field approximation (SFA), it is found that the locations of the harmonic minima are related not only to the nuclear distance between the two main atoms contributing to the harmonic generation, but also to the symmetry of the molecular orbital. Therefore, we modify the initial phase difference between the double wave sources in the two-center model, and predict the harmonic minimum positions consistent with those simulated by SFA.

• 出版日期2016-3
• 单位台州学院; 吉林大学; 北京应用物理与计算数学研究所; 长春理工大学