High-order harmonic generation by a spatially inhomogeneous field

被引：50
作者：
Fetic, Benjamin [1 ]
Kalajdzic, Kenan [2 ]
Milosevic, Dejan B. [1 ,3 ,4 ]
机构：
[1] Univ Sarajevo, Fac Sci, Sarajevo 71000, Bosnia & Herceg
[2] Ctr Comp Educ CCED, Sarajevo 71000, Bosnia & Herceg
[3] Max Born Inst, D-12489 Berlin, Germany
[4] Acad Sci & Arts Bosnia & Herzegovina, Sarajevo 71000, Bosnia & Herceg
来源：
ANNALEN DER PHYSIK | 2013年 / 525卷 / 1-2期
关键词：
High-order harmonic generation; plasmonic; ABOVE-THRESHOLD IONIZATION; STATIC-ELECTRIC-FIELD; PLATEAU;
D O I：
10.1002/andp.201200184
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Plasmonic field-enhanced high-order harmonic generation is investigated theoretically. The plasmonic field is modeled as a spatially inhomogeneous field with a time-dependent cosine squared pulse envelope. A method for solution of the three-dimensional time-dependent Schrodinger equation for a hydrogen atom in such a field is presented. It was found that the harmonic cutoff can be significantly increased. For larger values of the inhomogeneity parameter and longer pulses additional plateaus with higher cutoffs appear in the harmonic spectra. A semiclassical method, which takes into account nonzero initial coordinate and momentum of the ionized electron, is also developed. Using this method the observed multiplateau structure and cutoff positions are explained.
引用
收藏
页码：107 / 117
页数：11
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