scholarly journals Gauge invariance and interpretation of interband and intraband processes in high-order harmonic generation from bulk solids

2017 ◽  
Vol 96 (3) ◽  
Author(s):  
Péter Földi
Keyword(s):  
Harmonic Generation ◽  
Gauge Invariance ◽  
High Order ◽  
High Order Harmonic Generation ◽  
Bulk Solids ◽  
High Order Harmonic

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

2019 ◽  
Vol 9 (8) ◽  
pp. 1572
Author(s):  
Viktor Szaszkó-Bogár ◽  
Péter Földi ◽  
István Magashegyi ◽  
Katalin Varjú
Keyword(s):  
Harmonic Generation ◽  
Dipole Approximation ◽  
High Order ◽  
Quantum Mechanical ◽  
High Order Harmonic Generation ◽  
Dynamical Equations ◽  
Bulk Solids ◽  
High Order Harmonic ◽  
Exciting Photon ◽  
Even Order

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.

Relativistic high-order harmonic generation

2003 ◽  
Vol 50 (3-4) ◽  
pp. 375-386
Author(s):  
D. B. MilosÕeviĆ ◽  
W. Becker
Keyword(s):  
Harmonic Generation ◽  
High Order ◽  
High Order Harmonic Generation ◽  
High Order Harmonic

scholarly journals High-order harmonic generation in laser-produced ions using a near-infrared laser

1995 ◽  
Vol 51 (1) ◽  
pp. 585-591 ◽  
Author(s):  
C.-G. Wahlström ◽  
S. Borgström ◽  
J. Larsson ◽  
S.-G. Pettersson
Keyword(s):  
Harmonic Generation ◽  
Near Infrared ◽  
Infrared Laser ◽  
High Order ◽  
High Order Harmonic Generation ◽  
High Order Harmonic
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