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Pure Even Harmonic Generation from Oriented CO in Linearly Polarized Laser Fields

Hu, Hongtao ; Li, Na ; Liu, Peng ; Li, Ruxin ; Xu, Zhizhan

Physical review letters, 2017-10, Vol.119 (17), p.173201-173201, Article 173201 [Periódico revisado por pares]

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Título:
Pure Even Harmonic Generation from Oriented CO in Linearly Polarized Laser Fields
Autor: Hu, Hongtao ; Li, Na ; Liu, Peng ; Li, Ruxin ; Xu, Zhizhan
É parte de: Physical review letters, 2017-10, Vol.119 (17), p.173201-173201, Article 173201
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: 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.
Editor: United States
Idioma: Inglês

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