High-order harmonic generation by a spatially inhomogeneous field

2012 ◽  
Vol 525 (1-2) ◽  
pp. 107-117 ◽  
Author(s):  
Benjamin Fetić ◽  
Kenan Kalajdžić ◽  
Dejan B. Milošević
Keyword(s):  
Harmonic Generation ◽  
High Order ◽  
Inhomogeneous Field ◽  
High Order Harmonic Generation ◽  
High Order Harmonic ◽  
Spatially Inhomogeneous

Theoretical study of high-order harmonic generation from the hydrogen molecular ion with a dichromatic spatially inhomogeneous field

2018 ◽  
Vol 32 (14) ◽  
pp. 1850141 ◽  
Author(s):  
Xiao-Hu Xu ◽  
Yan-Jun Wang ◽  
Xiang-Yang Miao
Keyword(s):  
Harmonic Generation ◽  
Laser Field ◽  
Spectral Width ◽  
High Order ◽  
Inhomogeneous Field ◽  
High Order Harmonic Generation ◽  
Hydrogen Molecular Ion ◽  
Molecular Ion ◽  
Time Frequency ◽  
High Order Harmonic

We theoretically investigate the enhancement of high-order harmonic generation by numerically solving the non-Born–Oppenheimer time-dependent Schrödinger equation from the hydrogen molecular ion in a dichromatic inhomogeneous laser field. An ultrabroad supercontinuum up to 300 orders spectral width is generated. It is found that not only the inhomogeneity, but also the dichromatic field contributes to the significant extension of the harmonic cutoff compared with a monochromatic inhomogeneous laser field. Meanwhile, the long quantum paths can be suppressed and short ones can be enhanced by selecting optimized inhomogeneous parameter [Formula: see text], intensity and carrier envelope phase of the dichromatic inhomogeneous laser field. Furthermore, by superposing a properly selected range of the harmonic spectrum in the continuum region, an isolated 29-as pulse is generated. Both the classical theory and quantum time–frequency analysis are adopted to explain the physical mechanism.

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
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