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- Title
Theoretical study of high-order harmonic generation from the hydrogen molecular ion with a dichromatic spatially inhomogeneous field.
- Authors
Xu, Xiao-Hu; Wang, Yan-Jun; Miao, Xiang-Yang
- Abstract
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 , 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.
- Subjects
HARMONIC generation; HIGH-order derivatives (Mathematics); HYDROGEN molecular ion clusters; SCHRODINGER equation; NONLINEAR optics
- Publication
Modern Physics Letters B, 2018, Vol 32, Issue 14, p-1
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S0217984918501415