Journal
PHYSICAL REVIEW A
Volume 97, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.97.011401
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Funding
- FWF Austria [SFB-041 ViCoM, SFB-049 NextLite, W1243]
- COST Action CM1204 (XLIC)
- IMPRS-APS
- JSPS KAKENHI [16K05495, 15H03674, 26-1511]
- CREST, JST [JPMJCR16N5]
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High-order-harmonic generation by a highly nonlinear interaction of infrared laser fields with matter allows for the generation of attosecond pulses in the XUV spectral regime. This process, well established for atoms, has been recently extended to the condensed phase. Remarkably well-pronounced harmonics up to order similar to 30 have been observed for dielectrics. We establish a route toward an ab initio multiscale simulation of solid-state high-order-harmonic generation. We find that mesoscopic effects of the extended system, in particular the realistic sampling of the entire Brillouin zone, the pulse propagation in the dense medium, and the inhomogeneous illumination of the crystal, have a strong effect on the harmonic spectra. Our results provide an explanation for the formation of clean harmonics and have implications for a wide range of nonlinear optical processes in dense media.
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