Low-order harmonic generation of hydrogen molecular ion in laser field studied by the two-state model

• 来源期刊: 中国物理B（英文版）
• 关键词: low-order harmonic generation hydrogen molecule ion two-state model
• 年，卷（期）: 2018,（11）
• 页码范围: 459-465
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/11/113201

摘要

The low-order harmonic generation of hydrogen molecular ion interacting with a linearly polarized laser field has been investigated theoretically by using a simple two-state model.The validity of the two-state model is carefully examined by comparing the harmonic spectra of hydrogen molecular ion obtained from this model with those from the three-dimensional time-dependent Schr(o)dinger equation.When combined with the Morlet transform of quantum time-frequency spectrum,the two-state model can be used to study the dynamical origin of the low-order harmonic generation of hydrogen molecular ion driven by low-frequency pulses.In addition,some interesting structures of the time profiles for low order harmonics are obtained.