外文题目: Pure Even Harmonic Generation from Oriented CO in Linearly Polarized Laser Fields
作者: Hu, Hongtao; Li, Na; Liu, Peng; Li, Ruxin; Xu, Zhizhan
刊名: Phys. Rev. Lett.
年: 2017 卷: 119 期: 17 文章编号：173201
英文关键词:

DENSITY-FUNCTIONAL THEORY; ATTOSECOND SCIENCE; DYNAMICS; PSEUDOPOTENTIALS; ORBITALS; OCTOPUS; REGIME; PULSES; STATES; TOOL
英文摘要:
The first high harmonic spectrum containing only the odd orders was observed in experiments 30 years ago. However, a spectrum containing pure even harmonics has never been observed. We investigate the generation of pure even harmonics from oriented CO molecules in linearly polarized laser fields employing the time-dependent density-functional theory. We find that the even harmonics, with no odd orders, are generated with the polarization perpendicular to the laser polarization when the molecular axis of CO is perpendicular to the laser polarization. The generation of pure even harmonics reveals a type of dipole acceleration originating from the permanent dipole moment. This phenomenon exists in all systems with permanent dipole moments, including bulk crystal and polyatomic molecules.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1103/PhysRevLett.119.173201


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