Intensity-dependent interference effect in high-order harmonic generation from aligned H2+ molecules

被引：7
作者：
Wu, Yan [1 ]
Zhang, Jingtao [1 ]
Ye, Huiliang [1 ]
Xu, Zhizhan [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China
来源：
PHYSICAL REVIEW A | 2011年 / 83卷 / 02期
关键词：
MULTIPHOTON IONIZATION; ANGULAR-DISTRIBUTIONS; SCATTERING-THEORY; DYNAMICS; FIELDS;
D O I：
10.1103/PhysRevA.83.023417
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Based on the nonperturbative quantum scattering theory of high-order harmonic generation (HHG) and using the linear combination of atomic orbitals theory of molecular orbitals, we derive the HHG rate formula for molecules. Employing the formula, we study the intensity dependence of the interference effect induced by the molecular structure. We find that the molecular HHG was modulated by the interference not only in the recombination process but also in the ionization process. The location of the interference minimum in HHG shifts to higher energy by a quantity of the ponderomotive energy as the laser intensity increases.
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页数：6
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