Interference-Induced Phenomena in High-Order Harmonic Generation from Bulk Solids

被引：4

作者：

Szaszko-Bogar, Viktor ^{[1
,2
]}

Foldi, Peter ^{[1
,3
,4
]}

Magashegyi, Istvan ^{[3
]}

Varju, Katalin ^{[1
,2
]}

机构：

[1] ELI HU Nonprofit Ltd, ELI ALPS, Dugon Ter 13, H-6720 Szeged, Hungary

[2] Univ Szeged, Dept Opt & Quantum Elect, Dom Ter 9, H-6720 Szeged, Hungary

[3] Univ Szeged, Dept Photon & Laser Res, Interdisciplinary Excellence Ctr, H-6720 Szeged, Hungary

[4] Univ Szeged, Dept Theoret Phys, Tisza Lajos Korut 84, H-6720 Szeged, Hungary

来源：

APPLIED SCIENCES-BASEL | 2019年 / 9卷 / 08期

关键词：

light-matter interaction; high intensity lasers; high-order harmonic generation; optical phenomena in solids; REAL-TIME OBSERVATION; ATTOSECOND; PULSES; CONVERSION; RADIATION; DYNAMICS;

D O I：

10.3390/app9081572

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We consider a quantum mechanical model for the high-order harmonic generation in bulk solids. The bandgap is assumed to be considerably larger than the exciting photon energy. Using dipole approximation, the dynamical equations for different initial Bloch states are decoupled in the velocity gauge. Although there is no quantum mechanical interference between the time evolution of different initial states, the complete harmonic radiation results from the interference of fields emitted by all the initial (valence band) states. In particular, the suppression of the even-order harmonics can also be viewed as a consequence of this interference. The number of the observable harmonics (essentially the cutoff) is also determined by interference phenomena.

引用

页数：15

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