光谱学与光谱分析, 2013, 33 (2): 297, 网络出版: 2013-03-27
双电子H+3体系的高次谐波谱的数值模拟
Numerical Simulation on HHG Spectra of Two-Electron H+3 Model
摘要
提出了双电子H+3体系的一维计算模型。 采用对称分裂算符法计算波函数的时间演化, 数值模拟了在800 nm波长激光脉冲作用下体系的高次谐波(HHG)谱性质。 通过哈密顿算符中的电子相互作用项研究了电子间互作用对HHG谱的作用, 结果发现电子间的相互作用对HHG谱性质的影响不大, 但是会对截止频率有一定影响; 还模拟了体系在不同核间距下的HHG谱的截止频率, 发现较大的核间距的截止频率大于半经典三步模型给出的截止频率, 并对其进行了初步分析。
Abstract
The authors present a one-dimensional calculation model of H+3, and the time-dependent wavefunction was obtained by the symmetric split-operator method. The authors investigated the high-order harmonic generation (HHG) properties of H+3 model exposed to 800 nm-wavelength ultrashort laser pulse. The effect of electron interaction on the HHG spectra is less profound than at the cut-off frequency. We also calculated the HHG spectra for different internuclear separation values close to realistic one. Most of the calculated cutoff frequencies are beyond the three-step model’s prediction, and a preliminary scenario is suggested.
代春燕, 于川, 张贵忠, 姚建铨. 双电子H+3体系的高次谐波谱的数值模拟[J]. 光谱学与光谱分析, 2013, 33(2): 297. DAI Chun-yan, YU Chuan, ZHANG Gui-zhong, YAO Jian-quan. Numerical Simulation on HHG Spectra of Two-Electron H+3 Model[J]. Spectroscopy and Spectral Analysis, 2013, 33(2): 297.